Prepare for and practice interview questions from The Voleon Group.

The Voleon Group Interview Questions

The Voleon Group Interview Guides

Data Structures & Algorithms

Given two sorted lists, write a function to merge them into one sorted list.

Merge Sorted Lists

Find the missing integer from a array of consequtive integers

Find the Missing Number

Find Bigrams

Write a function to create a single dataframe with complete addresses in the format of street, city, state, zip code.

Complete Addresses

Get Top N Frequent Words

Machine Learning

Encoding Categorical Features

Coefficients of Logistic Regression

Job Recommendation

RMS Error

Missing Housing Data

Write a query to select the top 3 departments with at least ten employees and rank them according to the percentage of their employees making over 100K in salary.

Employee Salaries

Select the 2nd highest salary in the engineering department

2nd Highest Salary

Write a query that returns all neighborhoods that have 0 users.

Empty Neighborhoods

Calculate the first touch attribution for each `user_id` that converted.

First Touch Attribution

Closest SAT Scores

Probability

First to Six

500 Cards

Raining in Seattle

Found Item

Ad Raters

Statistics

P-value to a Layman

Reducing Error Margin

What are the assumptions of linear regression?

Assumptions of Linear Regression

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

Hundreds of Hypotheses

Using R Squared

<p>When an interviewer asks a question along the lines of:</p>

<ul>
<li>What would your current manager say about you? What constructive criticisms might he give?</li>
<li>What are your three biggest strengths and weaknesses you have identified in yourself?</li>
</ul>

<p>How would you respond?</p>


<p>When asked about your strengths in an interview, what is an effective way to respond?</p>

When asked about your strengths in an interview, what is an effective way to respond?

Your Strengths and Weaknesses I

<p>Which of the following is an acceptable strategy when discussing weaknesses in an interview?</p>

Which of the following is an acceptable strategy when discussing weaknesses in an interview?

Your Strengths and Weaknesses II

What do you tell an interviewer when they ask you what your strengths and weaknesses are?

Your Strengths and Weaknesses

Brainteasers

<p>When an interviewer asks you a question along the lines of:</p>

<ul>
<li>Why did you apply to our company?</li>
<li>What are you looking for in your next job?</li>
<li>What makes you a good fit for our company?</li>
</ul>

<p>How should you respond?</p>


<p>When asked 'What are you looking for in your next job?' in an interview, how can you tie the company's employee benefits into your response?</p>

When asked 'What are you looking for in your next job?' in an interview, how can you tie the company's employee benefits into your response?

Why Do You Want to Work With Us I

<p>How can company values be used effectively in an interview when asked 'What makes you a good fit for our company?'</p>

How can company values be used effectively in an interview when asked 'What makes you a good fit for our company?'

Why Do You Want to Work With Us II

<p>When responding to the question 'Why did you apply to our company?' during an interview, what aspect should you highlight?</p>

When responding to the question 'Why did you apply to our company?' during an interview, what aspect should you highlight?

Why Do You Want to Work With Us III

How would you answer when an Interviewer asks why you applied to their company?

Why Do You Want to Work With Us

<p>Describe a data project you worked on. What were some of the challenges you faced?</p>


Describing a data project and its challenges

Hurdles In Data Projects

Analytics

<p>How would you explain what a p-value is to someone who is not technical?</p>


<p>What does a p-value in a statistical test represent?</p>

What does a p-value in a statistical test represent?

P-value to a Layman I

<p>In a statistical test, how does a low p-value (less than 0.05) influence our decision about the null hypothesis?</p>

In a statistical test, how does a low p-value (less than 0.05) influence our decision about the null hypothesis?

P-value to a Layman II

<p>What are the assumptions of linear regression?</p>


Which assumption of the residuals of the standard linear regression model can not be overcome by increasing the sample size?

Regression assumptions

<p>Let’s say that you’re training a classification model.</p>

<p>How would you combat overfitting when building tree-based models?</p>


Let's say that you're training a classification model.   How would you combat overfitting when building tree-based models?

Overfit Avoidance

<p>How would you handle the data preparation for building a machine learning model using imbalanced data?</p>


Addressing imbalanced data in machine learning through carefully prepared techniques.

Data Preparation for Imbalanced Data

<p>Let’s say we’re comparing two machine learning algorithms. In which case would you use a bagging algorithm versus a boosting algorithm? </p>

<p>Give an example of the tradeoffs between the two.</p>


<p>In machine learning, when would you use a bagging algorithm over a boosting algorithm?</p>


In machine learning, when would you use a bagging algorithm over a boosting algorithm?

Bagging vs. Boosting

Bagging vs Boosting

<p>Talk about a time when you had trouble communicating with stakeholders. How were you able to overcome it?</p>


Strategically resolving misaligned expectations with stakeholders for a successful project outcome

Stakeholder Communication

<p>Given a string, write a function to determine if it is palindrome or not.</p>

<p><em>Note: A palindrome is a word/string that is read the same way forward as it is backward, e.g. <code>&#39;reviver&#39;</code>, <code>&#39;madam&#39;</code>, <code>&#39;deified&#39;</code> and <code>&#39;civic&#39;</code> are all palindromes, while <code>&#39;tree&#39;</code>, <code>&#39;music&#39;</code> and <code>&#39;person&#39;</code> are not palindromes.</em></p>

<p><strong>Example:</strong></p>

<p><strong>Input:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="n">word1</span> <span class="o">=</span> <span class="s2">&#34;tree&#34;</span>
</span></span><span class="line"><span class="cl"><span class="n">word2</span> <span class="o">=</span> <span class="s2">&#34;radar&#34;</span>
</span></span></code></pre>

<p><strong>Output:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="k">def</span> <span class="nf">is_palindrome</span><span class="p">(</span><span class="n">word1</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">False</span>
</span></span><span class="line"><span class="cl"><span class="k">def</span> <span class="nf">is_palindrome</span><span class="p">(</span><span class="n">word2</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">True</span>
</span></span></code></pre>


Given a string, write a function to determine if it is palindrome or not.

String Palindromes

<p>Write a SQL query to select the 2nd highest salary in the engineering department.</p>

<p><strong>Note:</strong> If more than one person shares the highest salary, the query should select the next highest salary.</p>

<p><strong>Example:</strong></p>

<p><strong>Input:</strong></p>

<p><code>employees</code> table</p>

<table>
<thead>
<tr>
<th>Column</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>first_name</code></td>
<td>VARCHAR</td>
</tr>

<tr>
<td><code>last_name</code></td>
<td>VARCHAR</td>
</tr>

<tr>
<td><code>salary</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>department_id</code></td>
<td>INTEGER</td>
</tr>
</tbody>
</table>
<p><code>departments</code> table</p>

<table>
<thead>
<tr>
<th>Column</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>name</code></td>
<td>VARCHAR</td>
</tr>
</tbody>
</table>
<p><strong>Output:</strong></p>

<table>
<thead>
<tr>
<th>Column</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>salary</code></td>
<td>INTEGER</td>
</tr>
</tbody>
</table>


<p>Imagine you are asked to build a machine learning model to decide new loan approvals for a
financial firm. You ask the data department in the company for a subset of data to get started
working on the problem. The data includes different features about applicants such as age,
occupation, zip code, height, number of children, favorite color, etc. You decide to build
multiple machine learning models to test out different ideas before settling on the best one.</p>

<p>How would you explain the bias-variance tradeoff with regards to
building and choosing a model to use?</p>


Bias vs. Variance Tradeoff

<p>Explain the difference between the XGBoost and random forest algorithms and give an example where you would use one over the other.</p>


<p>Why might a data scientist choose to use XGBoost instead of Random Forest for a particular machine learning task?</p>


Why might a data scientist choose to use XGBoost instead of Random Forest for a particular machine learning task?

XGBoost vs Random Forest: Choice

Xgboost vs Random Forest

<p>What is the difference between Logistic and Linear Regression?</p>

<p>When would use one instead of the other in practice?</p>


What is the difference between Logistic and Linear Regression?

Linear vs Logistic Regression

<p>Let’s say that you work at a B2B SAAS company that’s interested in testing the pricing of different levels of subscriptions.</p>

<p>Your project manager comes to you and asks you to run a two-week-long A/B test to test an increase in pricing.</p>

<p>How would you approach designing this test?  How would you determine whether the increase in pricing is a good business decision?</p>


Testing Price Increase

A/B Testing

<p>Create a class named <strong><code>LRUCache</code></strong> that implements the behavior expected of a Least Recently Used (LRU) Cache.</p>

<p>The <strong><code>LRUCache</code></strong> class implements the following methods:</p>

<ul>
<li><strong><code>__init__(self, capacity)</code></strong> - initializes the object and takes in a capacity parameter specifying the maximum capacity of the cache.</li>
<li><strong><code>get_if_exists(self, key) -&gt; Any|None</code></strong> - gets a value based on a key. If the key exists, returns the associated value. If the key has expired or did not exist in the first place, returns <code>None</code>.</li>
<li><strong><code>put(self, key, value)</code></strong> - places a value inside the cache. In the case wherein the cache is full, invalidates the least recently used element. When two keys collide, the older value should be invalidated in place of the new one.</li>
</ul>

<p><strong>Example:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="n">cache</span> <span class="o">=</span> <span class="n">LRUCache</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
</span></span><span class="line"><span class="cl"><span class="n">cache</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="s2">&#34;sample&#34;</span><span class="p">,</span> <span class="mi">55</span><span class="p">)</span>
</span></span><span class="line"><span class="cl"><span class="n">cache</span><span class="o">.</span><span class="n">get_if_exists</span><span class="p">(</span><span class="s2">&#34;sample&#34;</span><span class="p">)</span>  <span class="c1"># returns 55</span>
</span></span><span class="line"><span class="cl"><span class="n">cache</span><span class="o">.</span><span class="n">get_if_exists</span><span class="p">(</span><span class="s2">&#34;key&#34;</span><span class="p">)</span>  <span class="c1"># returns None</span>
</span></span><span class="line"><span class="cl"><span class="n">cache</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="s2">&#34;hello&#34;</span><span class="p">,</span> <span class="mi">10</span><span class="p">)</span> 
</span></span><span class="line"><span class="cl"><span class="n">cache</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="s2">&#34;sample&#34;</span><span class="p">,</span> <span class="mi">9</span><span class="p">)</span>
</span></span><span class="line"><span class="cl"><span class="n">cache</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="s2">&#34;world&#34;</span><span class="p">,</span> <span class="mi">5</span><span class="p">)</span>
</span></span><span class="line"><span class="cl"><span class="n">cache</span><span class="o">.</span><span class="n">get_if_exists</span><span class="p">(</span><span class="s2">&#34;hello&#34;</span><span class="p">)</span>  <span class="c1"># returns None</span>
</span></span></code></pre>

<p>Notes:</p>

<ul>
<li><p>It is assured that the value in the <strong><code>put</code></strong> method will never receive a <code>None</code> value. Moreover, it is assured that the capacity will always be &gt; 0.</p></li>

<li><p>All operations must be O(1).</p></li>

<li><p>Aside from Python’s standard dictionary implementation (<code>{}</code>), you may not use any other built-in data structures.</p></li>
</ul>


LRU Cache 1

<p>A team wants to A/B test multiple different changes through a sign-up funnel.</p>

<p>For example, on a page, a button is currently red and at the top of the page. They want to see if changing a button from red to blue and/or from the top of the page to the bottom of the page will increase click-through.</p>

<p>How would you set up this test?</p>


<p>Your team wants to run an AB test on the color (red or blue) and position (top/bottom of the page) of a button that links to a promotion.</p>

<p>How many different variants of the test should you run to see the effect that a red button has on the bottom of the page, if currently the button is blue and on the top of the page.</p>


Your team wants to run an AB test on the color (red or blue) and position (top/bottom of the page) of a button that links to a promotion.

How many different variants of the test should you run to see the effect that a red button has on the bottom of the page, if currently the button is blue and on the top of the page.

A/B Test Variants

Button AB Test

<p>Let’s say we want to launch a re-design of a landing page to improve the click-through rate. We can do this by implementing an AB test.
Given that we launch an AB test, how would you infer if the results of the click-through rate were statistically significant or not?</p>


<p>How can you accurately conclude if the results of an A/B test, conducted to evaluate the effectiveness of a landing page redesign, are statistically significant?</p>


How can you accurately conclude if the results of an A/B test, conducted to evaluate the effectiveness of a landing page redesign, are statistically significant?

Statistically Significant Test

Precisely ascertain whether the outcomes of an A/B test, executed to assess the impact of a landing page redesign, exhibit statistical significance.

<p>Given an array and a target integer, write a function <code>sum_pair_indices</code> that returns the indices of two integers in the array that add up to the target integer. If not found, just return an empty list.</p>

<p><em>Note: Can you do it on $O(n)$ time?</em></p>

<p><em>Note: Even though there could be many solutions, only one needs to be returned.</em></p>

<p><strong>Example 1:</strong></p>

<p><strong>Input:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="n">array</span> <span class="o">=</span> <span class="p">[</span><span class="mi">1</span> <span class="mi">2</span> <span class="mi">3</span> <span class="mi">4</span><span class="p">]</span> 
</span></span><span class="line"><span class="cl"><span class="n">target</span> <span class="o">=</span> <span class="mi">5</span> 
</span></span></code></pre>

<p><strong>Output:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="k">def</span> <span class="nf">sum_pair_indices</span><span class="p">(</span><span class="n">array</span><span class="p">,</span> <span class="n">target</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="p">[</span><span class="mi">0</span> <span class="mi">3</span><span class="p">]</span> <span class="ow">or</span> <span class="p">[</span><span class="mi">1</span> <span class="mi">2</span><span class="p">]</span>
</span></span></code></pre>

<p><strong>Example 2:</strong></p>

<p><strong>Input:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="n">array</span> <span class="o">=</span> <span class="p">[</span><span class="mi">3</span><span class="p">]</span>
</span></span><span class="line"><span class="cl"><span class="n">target</span> <span class="o">=</span> <span class="mi">6</span> 
</span></span></code></pre>

<p><strong>Output:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="n">Do</span> <span class="n">NOT</span> <span class="k">return</span> <span class="p">[</span><span class="mi">0</span> <span class="mi">0</span><span class="p">]</span> <span class="k">as</span> <span class="n">you</span> <span class="n">can</span><span class="s1">&#39;t use an index twice.</span>
</span></span></code></pre>


Given an array and a target integer, write a function that returns the indices of two integers in the array that add up to the target integer.

Target Indices

<p>Let’s say that your company is running a standard control and variant AB test on a feature to increase conversion rates on the landing page. The PM checks the results and finds a .04 p-value.</p>

<p>How would you assess the validity of the result?</p>


Experiment Validity

<p>Let’s say that you work at a bank that wants to build a model to detect fraud on the platform.</p>

<p>The bank wants to implement a text messaging service in addition that will text customers when the model detects a fraudulent transaction in order for the customer to approve or deny the transaction with a text response.</p>

<p>How would we build this model?</p>


<p>Let’s say that you work at a bank that wants to build a model to detect fraud on the platform.</p>

<p>The bank wants to implement a text messaging service that will text customers when the model detects a fraudulent transaction in order for the customer to approve or deny the transaction with a text response.</p>

<p>Which statement is true?</p>


Let's say that you work at a bank that wants to build a model to detect fraud on the platform.

The bank wants to implement a text messaging service that will text customers when the model detects a fraudulent transaction in order for the customer to approve or deny the transaction with a text response.

Which statement is true?

Bank Fraud Model

<p>Let’s say you work at Allstate. Allstate is running <code>N</code>  online ads right now. The table <code>ads</code> contains all those ads, ranked by popularity via the <code>id</code> column (e.g., the entry with <code>id = 1</code> is the most popular, etc.).</p>

<p>Create a subquery or common table expression named <code>top_ads</code> containing the top 3 ads (by popularity) and return the number of rows that would result from the following operations</p>

<ol>
<li><code>ads INNER JOIN top_ads</code></li>
<li><code>ads LEFT JOIN top_ads</code></li>
<li><code>ads RIGHT JOIN top_ads</code></li>
<li><code>ads CROSS JOIN top_ads</code></li>
</ol>

<p><em>Note: Please make the <code>join_type</code> column in your output have the values <code>inner_join</code>, <code>left_join</code>, etc. for each of their respective join types</em></p>

<p><em>Note: Please return only one query with each number in a different row</em></p>

<p><strong>Example:</strong></p>

<p><strong>Input:</strong></p>

<table>
<thead>
<tr>
<th>Column</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>name</code></td>
<td>VARCHAR</td>
</tr>
</tbody>
</table>
<p><strong>Output:</strong></p>

<table>
<thead>
<tr>
<th>Column</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>join_type</code></td>
<td>VARCHAR</td>
</tr>

<tr>
<td><code>number_of_rows</code></td>
<td>INTEGER</td>
</tr>
</tbody>
</table>


Size of Joins

<p>Given an integer <code>N</code>, write a function that returns a list of all of the prime numbers up to <code>N</code>.</p>

<p><em>Note: Return an empty list there are no prime numbers less than or equal to <code>N</code>.</em></p>

<p><strong>Example:</strong></p>

<p><strong>Input:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="n">N</span> <span class="o">=</span> <span class="mi">3</span>
</span></span></code></pre>

<p><strong>Output:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="k">def</span> <span class="nf">prime_numbers</span><span class="p">(</span><span class="n">N</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="p">[</span><span class="mi">2</span><span class="p">,</span><span class="mi">3</span><span class="p">]</span>
</span></span></code></pre>


Given an integer N, write a function that returns all of the prime numbers up to N

Prime to N

<p>Regularization and cross-validation are two common techniques used to improve the performance of machine learning algorithms.</p>

<p>When should you use one versus the other?</p>


<p>Given the choices below, which one is an example of a scenario where we should be using regularization?</p>


Given the choices below, which one is an example of a scenario where we should be using regularization?

Regularization Example

Regularization and Validation

<p>What’s the difference between Lasso and Ridge Regression?</p>


<p>Under what circumstances is it recommended to use Lasso regression over Ridge regression?</p>

Under what circumstances is it recommended to use Lasso regression over Ridge regression?

Lasso vs Ridge

<h1>Binary Tree Validation</h1>

<p>You are given the root of a binary tree. You need to determine if it is a valid binary search tree (BST).</p>

<p>A valid BST is defined as follows:</p>

<ul>
<li>The left subtree of a node contains only nodes with values less than or equal to the node’s value.</li>
<li>The right subtree of a node contains only nodes with values greater than or equal to the node’s value.</li>
<li>Both the left and right subtrees must also be binary search trees.</li>
</ul>

<p>Given the function <code>def is_valid_bst(root: Node) -&gt; bool:</code>, return True if the binary tree is a valid BST. Otherwise, return False.</p>

<h3>Example:</h3>

<p><strong>Input:</strong></p>

<p><img src="https://d2qpirhrfplx04.cloudfront.net/9664817c-3e12-4a40-9236-8382b13f55a0.png" alt="image"/>Converted Binary Tree.png</p>

<p><strong>Output:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="k">def</span> <span class="nf">is_valid_bst</span><span class="p">(</span><span class="n">Node</span><span class="p">(</span><span class="mi">3</span><span class="p">))</span> <span class="o">-&gt;</span> <span class="kc">True</span>
</span></span></code></pre>


Given the root node, verify if a binary search tree is valid or not.

Binary Tree Validation

<p>How would you convey insights and the methods you use to a non-technical audience?</p>


Making data-driven insights actionable for those without technical expertise

Simple Explanations

<p>Let’s say you are working on Google Docs. A product manager comes to you and asks how the product is doing. </p>

<p>What are the top five metrics that you would start tracking to understand the health of Google Docs?</p>


Docs Metrics

Product Sense & Metrics

<p>What’s the relationship between PCA and K-means clustering?</p>


<p>What does the variable “k” in k-means clustering refer to?</p>


What does the variable "k" in k-means clustering refer to?

Input of K-means

PCA and K-Means

<p>The Fibonacci sequence is a series of numbers in which each number is the sum of the two preceding ones, usually starting with 0 and 1. It is often used in algorithm examples, and is defined by the following formula: F(n) = F(n-1) + F(n-2), with F(0) = 0 and F(1) = 1.</p>

<p>Your task is to implement the Fibonacci algorithm in three different methods:
1. Recursively
2. Iteratively
3. Using Memoization</p>

<p><strong>Example 1:</strong></p>

<p><strong>Input:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="n">n</span> <span class="o">=</span> <span class="mi">5</span>
</span></span></code></pre>

<p><strong>Output:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="n">fibonacci</span><span class="p">(</span><span class="n">n</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="mi">5</span>
</span></span></code></pre>

<p><strong>Example 2:</strong></p>

<p><strong>Input:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="n">n</span> <span class="o">=</span> <span class="mi">10</span>
</span></span></code></pre>

<p><strong>Output:</strong></p>

<pre tabindex="0" class="chroma"><code><span class="line"><span class="cl"><span class="n">fibonacci</span><span class="p">(</span><span class="n">n</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="mi">55</span>
</span></span></code></pre>

<p>The Fibonacci sequence starts as follows: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55…</p>


This question requires the implementation of the Fibonacci sequence using three different methods: recursively, iteratively, and using memoization.

Implementing the Fibonacci Sequence in Three Different Methods

Challenge

The Voleon Group Salaries by Position

<h5>Senior Software Engineer </h5><p>Voleon is a technology company that applies state-of-the-art AI and machine learning techniques to real-world problems in finance. For nearly two decades, we have led our industry and worked at the frontier of applying AI/ML to investment management. We have become a multibillion-dollar asset manager, and we have ambitious goals for the future. </p><p>As a Senior Software Engineer on our Back Office Engineering team, you will be developing the company's production trading systems and the data pipelines that drive our machine learning in both production and research. You will be expected to work closely with both our finance and research teams to contribute to a platform that supports a diverse set of requirements and complex trading behaviors. </p><p>This role is open to remote work in the US or hybrid in our Berkeley office. </p><h5>Your Team </h5><p>We look for brilliant people with a passion for solving problems through innovation and engineering fundamentals. You'll work in a collaborative environment that encourages creative thinking and efficient implementation. We embrace experimentation. You'll work alongside experienced engineers recruited from leading technology companies and universities. You and your team will collaborate closely with top machine learning researchers. </p><p>Your colleagues will include internationally recognized experts in artificial intelligence and machine learning research as well as highly experienced finance and technology professionals. The people who shape our company come from other backgrounds, including concert music performances, humanitarian aid, opera singing, sports writing, and BMX racing. You will be part of a team that loves to succeed together. </p><p>In addition to our enriching and collegial working environment, we offer highly competitive compensation and benefits packages, technology talks by our experts, a beautiful modern office, daily catered lunches, and more. </p><h5>Responsibilities </h5><ul> <li>Design and optimize robust, scalable data infrastructure and real-time stream processing systems to support historical and live pipelines using tools like Python, Airflow, Go, and Apache Beam. </li><li>Develop and maintain observability and remediation tools to monitor and analyze trading performance and risk, ensuring reliability and transparency in operations. </li><li>Lead efforts to integrate new financial assets and markets, clarifying requirements and ensuring seamless functionality within existing systems. </li><li>Enhance the resilience, scalability, and performance of accounting and reporting systems to meet evolving business needs. </li><li>Build advanced tooling to unify data from diverse vendors, standardizing symbol mappings to ensure consistency and accuracy across systems. </li><li>Lead complex, company-wide projects by collaborating cross-functionally with research, legal, trading, finance operations, data, and infrastructure teams to deliver comprehensive end-to-end accounting and reporting systems. </li><li>Build the infrastructure required for optimal extraction, transformation, and loading of data from various data sources. </li><li>Guide and support the growth of other engineers on the team by mentoring them and sharing your expertise, best practices, and knowledge. </li></ul> <h5>Requirements </h5><ul> <li>Bachelor's degree in Computer Science or equivalent professional experience in a related technical field. </li><li>5+ years of software engineering experience designing and building high-performance, reliable systems. </li><li>Proven expertise in operating and scaling large-scale, mission-critical production systems, with proficiency in programming languages such as Python. </li><li>Strong communication and project management skills, particularly in navigating complex technical domains and cross-functional collaboration. </li><li>Demonstrated ability to mentor engineers and provide leadership in driving technical direction and system architecture. </li></ul> <h5>Preferred Qualifications </h5><ul> <li>Expertise in building and optimizing data pipelines (e.g., Apache Airflow, Spark, Kafka). </li><li>Experience with profiling and performance optimizations on distributed systems. </li><li>Familiarity with modern Python data science tooling (pandas, polars, dask, duckdb, etc.). </li><li>Experience with modern data engineering technologies. </li></ul> <p>The base salary range for this position is $225,000 to $255,000 in the location(s) of this posting. Individual salaries are determined through a variety of factors, including, but not limited to, education, experience, knowledge, skills, and geography. Base salary does not include other forms of total compensation, such as bonus compensation and other benefits. Our benefits package includes medical, dental, and vision coverage, life and AD&D insurance, 20 days of paid time off, 9 sick days, and a 401(k) plan with a company match. </p><p>The Voleon Group is an Equal Opportunity employer. Applicants are considered without regard to race, color, religion, creed, national origin, age, sex, gender, marital status, sexual orientation and identity, genetic information, veteran status, citizenship, or any other factors prohibited by local, state, or federal law. </p>

<h3>Job Description</h3><div>Job Description<div><div>Voleon Securities, a new business within the Voleon Group, provides liquidity in securities markets. We apply state-of-the-art AI/ML techniques to construct our liquidity-provision strategies. For more than a decade, our affiliate Voleon Capital Management has led the hedge fund industry and worked at the frontier of applying AI/ML to investment management, becoming a multibillion-dollar asset manager. Voleon Securities builds on Voleon’s deep real-world experience applying ML to financial markets. </div><div><br /></div><div>We are seeking an entrepreneurial Technical Lead in Data Science who is excited to get in on the ground floor of a growing securities business. Data is at the heart of everything we do—from modeling and strategy development to production monitoring and compliance. As we expand our data-driven investment initiatives, we are seeking a Technical Lead in Data Science to guide the design, implementation, and evolution of our analytical systems and mentor a growing team of data scientists. </div><div><br /></div><div>As a Technical Lead – Data Science, you will provide technical direction and management fora team of data scientists working on high-impact problems across trading and research systems. You will be responsible for shaping analytical frameworks, ensuring methodological rigor, and delivering insights that inform business and research decisions. You will collaborate with stakeholders in engineering, research, and leadership while driving innovation and excellence in our data science practice. </div>Responsibilities<ul><li>Collaborate with Technical Product Owners in Research and Engineering to define priorities, scope solutions, and deliver actionable insights to stakeholders. </li><li>Own investigations of complex production behaviors and design robust methods for identifying, analyzing, and communicating system anomalies. </li><li>Mentor and manage junior and mid-level data scientists; provide architectural oversight for data projects. </li><li>Serve as a technical authority within the data science function, set standards for data quality, statistical rigor, and reproducibility. </li><li>Lead the design, development, and deployment of analytical pipelines to monitor and interpret production behavior across trading and research systems, ensuring its correctness. </li><li>Champion best practices in data governance, tooling, and collaborative development (CI/CD, version control, code reviews). </li><li>Drive continual growth and learning within the team by onboarding new Data Scientists, growing teams, and fostering a culture of curiosity, collaboration, and applied experimentation. </li></ul>Requirements<ul><li>Master’s degree or higher in a quantitative, technical, or analytical field such as Data Science, Statistics, Computer Science, Engineering, Finance, or an MBA with strong analytical training. </li><li>3+ years of experience managing data scientists, including responsibility for performance development, technical direction, and project execution. </li><li>Demonstrated ability to lead cross-functional data initiatives, translate business objectives into analytical goals, and ensure timely delivery. </li><li>Strong understanding of data science fundamentals, including statistical analysis, data preparation, root cause investigation, and the proven ability to guide others' work in these areas. </li><li>Familiarity with data tooling and workflows (e.g., SQL, Pandas, R, Airflow), with enough fluency to review and support technical contributors effectively. </li><li>Basic software development skills and experience with bash, linux/unix, and git </li><li>Experience communicating complex findings to executive and technical stakeholders, including presenting insights, tradeoffs, and recommendations. </li><li>Track record of establishing scalable methodologies, driving technical standards, and fostering collaboration in fast-paced, analytically rigorous environments. </li></ul>Preferred<ul><li>Experience building or growing high-performing data science teams in production-aware or high-stakes settings. </li><li>Exposure to financial markets, trading systems, or quantitative research environments. </li><li>Familiarity with production monitoring systems, data quality pipelines, or analytics platform development. </li><li>7+ years of experience managing data scientists. </li><li>Experience managing a large team or multiple teams.   </li></ul><div>The base salary range for this position is $210,000 to $260,000 in the location(s) of this posting. Individual salaries are determined by a variety of factors, including, but not limited to, education, experience, knowledge, skills, and geographic location. Base salary does not include other forms of total compensation, such as bonus compensation and other benefits. Our benefits package includes medical, dental, and vision coverage, as well as life and AD&D insurance, 20 days of paid time off, nine sick days, and a 401(k) plan with a company match. </div><div><b>“Friends of Voleon” Candidate Referral Program</b> </div><div>If you have a great candidate in mind for this role and would like to have the potential to earn $15,000 if your referred candidate is successfully hired and employed by The Voleon Group, please use this form to submit your referral. For more details regarding eligibility, terms, and conditions, please review the Voleon Referral Bonus Program. </div><div> </div><div><b>Equal Opportunity Employer</b> </div><div>The Voleon Group is an Equal Opportunity employer. Applicants are considered without regard to race, color, religion, creed, national origin, age, sex, gender, marital status, sexual orientation and identity, genetic information, veteran status, citizenship, or any other factors prohibited by local, state, or federal law. </div><div><br /></div><div>We may use artificial intelligence (AI) tools to support parts of the hiring process. These tools assist our recruitment team but do not replace human judgement. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us. </div><p>We may use artificial intelligence (AI) tools to support parts of the hiring process. These tools assist our recruitment team but do not replace human judgement. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</p></div></div>

<h5>Staff Software Engineer, Trading Platforms </h5><p>Voleon is a technology company that applies state-of-the-art AI and machine learning techniques to real-world problems in finance. For more than a decade, we have led our industry and worked at the frontier of applying AI/ML to investment management. We have become a multibillion-dollar asset manager, and we have ambitious goals for the future. </p><p>As a Staff Software Engineer on our Trading Platforms Engineering team, you will be developing the company's production trading systems and the data pipelines that drive our machine learning in both production and research. You will be expected to work closely with both our finance and research teams to contribute to a platform that supports a diverse set of requirements and complex trading behaviors. </p><h5>Responsibilities </h5><p>Design real-time distributed trading systems that place orders across a global set of markets and asset classes (Go / C++) </p><p>Build and optimize large-scale data infrastructure and stream processing systems for historical and real-time machine learning feature pipelines (Python/Airflow/Go/beam) </p><p>Own observability and remediation tooling used to analyze trading performance and risk (Go / Python / React) </p><p>Integrate with new assets and markets and drive clarity on the resulting requirements </p><p>Improve the resilience and performance of our trading systems </p><p>Develop tooling to integrate data from diverse vendors, unifying symbol mappings for data consistency </p><p>Lead company spanning complex projects. Collaborate across research, legal, trading, finance operations data, and infra teams to deliver end-to-end trading systems </p><p>Mentor and develop other engineers on the team, and share your practices and knowledge with the team and company </p><h5>Requirements </h5><p>Computer Science Degree or equivalent experience </p><p>7+ years of software engineering experience building high-performance systems </p><p>Experience operating and scaling mission-critical, large-scale production systems in languages such as Python, Go and C++ </p><p>Excellent communication and project management skills in complex technical domains </p><p>Track record mentoring engineers and leading technical direction </p><h5>Preferred Qualifications </h5><p>Expertise in building and optimizing data pipelines (e.g., Apache Airflow, Spark, Kafka) </p><p>Experience with profiling and performance optimizations on distributed systems. (Go / C++) </p><p>Exposure to modern Python data science tooling. (pandas, polars, dask, duckdb etc) </p><p>Compensation </p><p>The base salary range for this position is $270,000 to $300,000 in the location(s) of this posting. Individual salaries are determined through a variety of factors, including, but not limited to, education, experience, knowledge, skills, and geography. Base salary does not include other forms of total compensation, such as bonus compensation and other benefits. Our benefits package includes medical, dental, and vision coverage, life and AD&D insurance, 20 days of paid time off, 9 sick days, and a 401(k) plan with a company match. </p><p>"Friends of Voleon" Candidate Referral Program </p><p>If you have a great candidate in mind for this role and would like to have the potential to earn $15,000 if your referred candidate is successfully hired and employed by The Voleon Group, please use this form to submit your referral. For more details regarding eligibility, terms, and conditions, please make sure to review the Voleon Referral Bonus Program. </p><p>Equal Opportunity Employer </p><p>The Voleon Group is an Equal Opportunity employer. Applicants are considered without regard to race, color, religion, creed, national origin, age, sex, gender, marital status, sexual orientation and identity, genetic information, veteran status, citizenship, or any other factors prohibited by local, state, or federal law. </p><p>Vaccination Requirement </p><p>The Voleon Group has implemented a policy requiring all employees who will be entering our worksite, including new hires, to be fully vaccinated with the COVID-19 vaccine. This policy also applies to remote employees, as such employees will be asked to visit our offices from time to time. To the extent permitted by applicable law, proof of vaccination will be required as a condition of employment. This policy is part of Voleon's ongoing efforts to ensure the safety and well-being of our employees and community, and to support public health efforts. </p>

<h3>Job Description</h3><div>Job Description<div><div>Voleon is a technology company that applies state-of-the-art AI and machine learning techniques to real-world problems in finance. For nearly two decades, we have led our industry and worked at the frontier of applying AI/ML to investment management. We have become a multibillion-dollar asset manager, and we have ambitious goals for the future.</div><div><br /></div><div>As a Staff Software Engineer on our Trading Platforms Engineering team, you will be developing the company's production trading systems and the data pipelines that drive our machine learning in both production and research. You will be expected to work closely with both our finance and research teams to contribute to a platform that supports a diverse set of requirements and complex trading behaviors.</div><div><br /></div><div><b>Your Team</b></div><div><br /></div><div>We look for brilliant people with a passion for solving problems through innovation and engineering fundamentals. You’ll work in a collaborative environment that encourages creative thinking and efficient implementation. We embrace experimentation. You’ll work alongside experienced engineers recruited from leading technology companies and universities. You and your team will collaborate closely with top machine learning researchers.</div><div><br /></div><div>Your colleagues will include internationally recognized experts in artificial intelligence and machine learning research as well as highly experienced finance and technology professionals. The people who shape our company come from other backgrounds, including concert music performances, humanitarian aid, opera singing, sports writing, and BMX racing. You will be part of a team that loves to succeed together.</div><div><br /></div><div>In addition to our enriching and collegial working environment, we offer highly competitive compensation and benefits packages, technology talks by our experts, a beautiful modern office, daily catered lunches, and more.</div>Responsibilities<ul><li>Design real-time distributed trading systems that place orders across a global set of markets and asset classes (Go / C++)</li><li>Build and optimize large-scale data infrastructure and stream processing systems for historical and real-time machine learning feature pipelines <span class="long-word">(Python/Airflow/Go/beam)</span></li><li>Own observability and remediation tooling used to analyze trading performance and risk (Go / Python / React)</li><li>Integrate with new assets and markets and drive clarity on the resulting requirements</li><li>Improve the resilience and performance of our trading systems</li><li>Develop tooling to integrate data from diverse vendors, unifying symbol mappings for data consistency</li><li>Lead company spanning complex projects. Collaborate across research, legal, trading, finance operations data, and infra teams to deliver end-to-end trading systems</li><li>Mentor and develop other engineers on the team, and share your practices and knowledge with the team and company</li></ul>Requirements<ul><li>Computer Science Degree or equivalent experience</li><li>7+ years of software engineering experience building high-performance systems</li><li>Experience operating and scaling mission-critical, large-scale production systems in languages such as Python, Go and C++</li><li>Excellent communication and project management skills in complex technical domains</li><li>Track record mentoring engineers and leading technical direction</li></ul>Preferred Qualifications<ul><li>Expertise in building and optimizing data pipelines (e.g., Apache Airflow, Spark, Kafka)</li><li>Experience with profiling and performance optimizations on distributed systems. (Go / C++)</li><li>Exposure to modern Python data science tooling. (pandas, polars, dask, duckdb etc)</li></ul><div><b>Compensation</b></div><div><br /></div><div>The base salary range for this position is $270,000 to $300,000 in the location(s) of this posting. Individual salaries are determined through a variety of factors, including, but not limited to, education, experience, knowledge, skills, and geography. Base salary does not include other forms of total compensation, such as bonus compensation and other benefits. Our benefits package includes medical, dental, and vision coverage, life and AD&D insurance, 20 days of paid time off, 9 sick days, and a 401(k) plan with a company match.</div><div><br /></div><div><b>“Friends of Voleon” Candidate Referral Program</b></div><div><br /></div><div>If you have a great candidate in mind for this role and would like to have the potential to earn $15,000 if your referred candidate is successfully hired and employed by The Voleon Group, please use this form to submit your referral. For more details regarding eligibility, terms, and conditions, please make sure to review the Voleon Referral Bonus Program.</div><div> </div><div><b>Equal Opportunity Employer</b></div><div><br /></div><div>The Voleon Group is an Equal Opportunity employer. Applicants are considered without regard to race, color, religion, creed, national origin, age, sex, gender, marital status, sexual orientation and identity, genetic information, veteran status, citizenship, or any other factors prohibited by local, state, or federal law.</div><div> </div><div>#LI-DL1</div><p>We may use artificial intelligence (AI) tools to support parts of the hiring process. These tools assist our recruitment team but do not replace human judgement. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</p></div></div>

<h5>Data Analyst </h5><p>Voleon is a technology company that applies state-of-the-art machine learning techniques to real-world problems in finance. For more than a decade, we have led our industry and worked at the frontier of applying machine learning to investment management. We have become a multibillion dollar asset manager, and we have ambitious goals for the future. </p><p>Your colleagues will include internationally recognized experts in machine learning research as well as highly experienced technology and finance professionals. The people who shape our company come from other backgrounds, too, including concert music performance, humanitarian aid, opera singing, sports writing, and BMX racing. You will be part of a team that loves to succeed together. </p><p>In addition to our enriching and collegial working environment, we offer competitive compensation and benefits packages, technology talks by our experts, a modern office, catered lunches, and more. </p><p>As a Data Analyst, you will be part of a team responsible for owning and simplifying the flow of data used by production trading algorithms at Voleon. Your work will focus on curating datasets and building processes and tools to standardize and simplify this curation. This role is a means to make a difference: as a machine learning company, data is essential to our business. </p><h5>Responsibilities </h5><p>Perform manual steps and develop automated processes to ensure the completeness and integrity of massive amounts of mission critical financial data pertaining to stocks, bonds, futures, commodities, and more. </p><p>Partner with members of the research staff to curate new and existing datasets. </p><p>Help drive continuous improvements to data quality procedures and a consistent approach to how data quality is measured, monitored, and reported. </p><p>Design systematic and automated processes and tools that allow the team to scale and rapidly onboard new datasets. </p><p>Share an on-call rotation and be the first responder ensuring the continuous operation of production-critical systems. </p><h5>Requirements </h5><p>Coursework or other relevant training in data analytics, programming, or computing systems. </p><p>Proven problem-solving and analytical abilities including pattern detection, root cause analysis, and issue resolution. </p><p>Experience with Python, pandas, and an interest in programming and data analysis/data science. </p><p>Experience with SQL and working with a relational database system. </p><p>A degree in a technical field. </p><h5>Preferred Qualifications </h5><p>Relevant experience in data operations, with proven process improvement skills. </p><p>An understanding of the software development process and exposure to hands-on coding in a professional environment. </p><p>Experience in exploratory data analysis and applied statistics. </p><p>Experience with Linux. </p><p>While financial industry experience is a plus, we are open-minded in our search for critical thinkers who are passionate about technology and data. </p><p>The base salary for this position is $115,000 to $125,000 in the location(s) of this posting. Individual salaries are determined through a variety of factors, including, but not limited to, education, experience, knowledge, skills, and geography. Base salary does not include other forms of total compensation such as bonus compensation and other benefits. Our benefits package includes medical, dental and vision coverage, life and AD&D insurance, 20 days of paid time off, 9 sick days, and a 401(k) plan with a company match. </p><p>The Voleon Group is an Equal Opportunity employer. Applicants are considered without regard to race, color, religion, creed, national origin, age, sex, gender, marital status, sexual orientation and identity, genetic information, veteran status, citizenship, or any other factors prohibited by local, state, or federal law. </p>

<h3>Job Description</h3><div>Job Description<div><div>Voleon is a technology company that applies state-of-the-art AI and machine learning techniques to real-world problems in finance. For nearly two decades, we have led our industry and worked at the frontier of applying AI/ML to investment management. We have become a multibillion-dollar asset manager, and we have ambitious goals for the future.</div><div><br /></div><div>As a Senior Software Engineer on our Trading Platforms Engineering team, you will be developing the company's production trading systems and the data pipelines that drive our machine learning in both production and research. You will be expected to work closely with both our finance and research teams to contribute to a platform that supports a diverse set of requirements and complex trading behaviors.</div><div><br /></div><div><b>Your Team</b></div><div><br /></div><div>We look for brilliant people with a passion for solving problems through innovation and engineering fundamentals. You’ll work in a collaborative environment that encourages creative thinking and efficient implementation. We embrace experimentation. You’ll work alongside experienced engineers recruited from leading technology companies and universities. You and your team will collaborate closely with top machine learning researchers.</div><div><br /></div><div>Your colleagues will include internationally recognized experts in artificial intelligence and machine learning research as well as highly experienced finance and technology professionals. The people who shape our company come from other backgrounds, including concert music performances, humanitarian aid, opera singing, sports writing, and BMX racing. You will be part of a team that loves to succeed together.</div><div><br /></div><div>In addition to our enriching and collegial working environment, we offer highly competitive compensation and benefits packages, technology talks by our experts, a beautiful modern office, daily catered lunches, and more.</div>Responsibilities<ul><li>Design real-time distributed trading systems that place orders across a global set of markets and asset classes (Go / C++)</li><li>Build and optimize large-scale data infrastructure and stream processing systems for historical and real-time machine learning feature pipelines <span class="long-word">(Python/Airflow/Go/beam)</span></li><li>Own observability and remediation tooling used to analyze trading performance and risk (Go / Python / React)</li><li>Integrate with new assets and markets and drive clarity on the resulting requirements</li><li>Improve the resilience and performance of our trading systems</li><li>Develop tooling to integrate data from diverse vendors, unifying symbol mappings for data consistency</li><li>Lead company spanning complex projects. Collaborate across research, legal, trading, finance operations data, and infra teams to deliver end-to-end trading systems</li><li>Mentor and develop other engineers on the team, and share your practices and knowledge with the team and company</li></ul>Requirements<ul><li>Computer Science Degree or equivalent experience</li><li>5+ years of software engineering experience building high-performance systems</li><li>Experience operating and scaling mission-critical, large-scale production systems in languages such as Python, Go and C++</li><li>Excellent communication and project management skills in complex technical domains</li><li>Track record mentoring engineers and leading technical direction</li></ul>Preferred Qualifications<ul><li>Expertise in building and optimizing data pipelines (e.g., Apache Airflow, Spark, Kafka)</li><li>Experience with profiling and performance optimizations on distributed systems. (Go / C++)</li><li>Exposure to modern Python data science tooling. (pandas, polars, dask, duckdb etc)</li></ul><div><b>Compensation</b></div><div><br /></div><div>The base salary range for this position is $225,000 to $255,000 in the location(s) of this posting. Individual salaries are determined through a variety of factors, including, but not limited to, education, experience, knowledge, skills, and geography. Base salary does not include other forms of total compensation, such as bonus compensation and other benefits. Our benefits package includes medical, dental, and vision coverage, life and AD&D insurance, 20 days of paid time off, 9 sick days, and a 401(k) plan with a company match.</div><div><br /></div><div><b>“Friends of Voleon” Candidate Referral Program</b></div><div><br /></div><div>If you have a great candidate in mind for this role and would like to have the potential to earn $15,000 if your referred candidate is successfully hired and employed by The Voleon Group, please use this form to submit your referral. For more details regarding eligibility, terms, and conditions, please make sure to review the Voleon Referral Bonus Program.</div><div> </div><div><b>Equal Opportunity Employer</b></div><div><br /></div><div>The Voleon Group is an Equal Opportunity employer. Applicants are considered without regard to race, color, religion, creed, national origin, age, sex, gender, marital status, sexual orientation and identity, genetic information, veteran status, citizenship, or any other factors prohibited by local, state, or federal law.</div><div><br /></div><div>#LI-DL1</div><p>We may use artificial intelligence (AI) tools to support parts of the hiring process. These tools assist our recruitment team but do not replace human judgement. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</p></div></div>

<h3>Job Description</h3><div>Job Description<div><div>Voleon is a technology company that applies state-of-the-art AI and machine learning techniques to real-world problems in finance. For nearly two decades, we have led our industry and worked at the frontier of applying AI/ML to investment management. We have become a multibillion-dollar asset manager, and we have ambitious goals for the future.</div><div> </div><div>Your colleagues will include internationally recognized experts in artificial intelligence and machine learning research as well as highly experienced finance and technology professionals.</div><div> </div><div>In addition to our enriching and collegial working environment, we offer highly competitive compensation and benefits packages, technology talks by our experts, a beautiful modern office, daily catered lunches, and more.</div><div><br /></div><div>The Voleon Group is forming a new team to help advance our data-driven investment initiatives. As a Data Scientist, you will be responsible for harvesting insights from a complex array of data. Your role will involve data curation, analysis, interpretation, visualization, and communication of your findings to members of the research staff and executive leadership.  This role is a means to make a difference: as a machine learning company, data insights are essential to our business.  </div>Responsibilities<ul><li>Design and implement systems to ensure data correctness and monitor data health in data stores and live feeds</li><li>Proactively identify abnormal production behavior and communicate them clearly to relevant stakeholders</li><li>Perform extemporaneous analyses on research and production trading systems with leadership   </li><li>Harness financial expertise and statistical analysis to gain actionable insights into our production trading and research systems</li><li>Design and implement analysis pipelines that automate those analyses found to be valuable for ongoing monitoring</li></ul>Requirements<ul><li>1+ years of applied end-to-end industry experience, including internships working with complex datasets, including curation, querying, aggregation, exploratory data analysis, and visualization</li><li>Experience using statistical methods to analyze data, identify patterns, conduct root cause analysis, discover insights, and recommend solutions</li><li>Ability to frame and answer questions mathematically</li><li>Ability to infer useful forward-looking directions from results of retrospective analysis</li><li>Fluency in managing, processing, and visualizing tabular data using a combination of SQL, Pandas, and R</li><li>Basic software development skills and experience with bash, linux/unix, and git</li><li>Ability to refine requirements from ambiguous requests to produce reports demonstrating excellence in communication</li><li>Bachelor’s degree in a quantitative discipline (statistics, biostatistics, data science, computer science, or a related field)</li></ul>Preferred<ul><li>Master’s degree in a quantitative discipline</li><li>Prior industry experience or displayed interest in finance, such as related academic projects, coursework in financial engineering, or industry internships </li><li>Experience developing in a production-facing environment and familiarity with standard concepts and tooling, e.g., CI/CD, git, Airflow</li></ul><div><b>Compensation</b></div><div>The base salary range for this position is $150,000 to $190,000 in the location(s) of this posting. Individual salaries are determined through a variety of factors, including, but not limited to, education, experience, knowledge, skills, and geography. Base salary does not include other forms of total compensation, such as bonus compensation and other benefits. Our benefits package includes medical, dental, and vision coverage, life and AD&D insurance, 20 days of paid time off, 9 sick days, and a 401(k) plan with a company match.</div><div><br /></div><div><b>“Friends of Voleon” Candidate Referral Program</b></div><div>If you have a great candidate in mind for this role and would like to have the potential to earn $7,500 if your referred candidate is successfully hired and employed by The Voleon Group, please use this form to submit your referral. For more details regarding eligibility, terms, and conditions, please make sure to review the Voleon Referral Bonus Program.</div><div> </div><div><b>Equal Opportunity Employer</b></div><div>The Voleon Group is an Equal Opportunity employer. Applicants are considered without regard to race, color, religion, creed, national origin, age, sex, gender, marital status, sexual orientation and identity, genetic information, veteran status, citizenship, or any other factors prohibited by local, state, or federal law.</div><div><br /></div><div>#LI-MD1</div><p>We may use artificial intelligence (AI) tools to support parts of the hiring process. These tools assist our recruitment team but do not replace human judgement. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</p></div></div>

Calculate Moving Average	SQL	Easy
Predict Customer Churn	Machine Learning	Medium
A/B Test Significance	Statistics	Medium
Optimize Query Performance	SQL	Hard
Feature Importance Analysis	Machine Learning	Medium
Clean Missing Data	Python	Easy
Neural Network Architecture	Deep Learning	Hard
Calculate Cohort Retention	SQL	Medium
Bayesian Probability	Statistics	Easy
Recommend Similar Products	Machine Learning	Hard

The Voleon Group Interview Questions

The Voleon Group Interview Guides