Prepare for and practice interview questions from Alten.

Alten Interview Questions

Alten Interview Guides

Machine Learning

Encoding Categorical Features

Coefficients of Logistic Regression

Missing Housing Data

Bank Fraud Model

One Million Rides

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

Get Top N Frequent Words

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

Prime to N

Move Zeros Back

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

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

First Touch Attribution

Closest SAT Scores

Get the top 3 highest employee salaries by department

Top Three Salaries

Probability

First to Six

500 Cards

Raining in Seattle

Found Item

Given three uniform(0,4) random variables, what is the probability that the median of them is greater than 3?

Median Probability

Statistics

P-value to a Layman

Say you are given a dataset of perfectly linearly separable data. What would happen when you run logistic regression?

Perfectly Separable

What are the assumptions of linear regression?

Assumptions of Linear Regression

Using R Squared

What statistical test could you use to determine which of two parcel types is better to use, given how often they are damaged?

Different Parcel Effectiveness

When an interviewer asks a question along the lines of:

<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>

How would you respond?

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

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

Your Strengths and Weaknesses I

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

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

Behavioral

When an interviewer asks you a question along the lines of:

<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>

How should you respond?

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?

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

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

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

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

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

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

Describing a data project and its challenges

Hurdles In Data Projects

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

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

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

P-value to a Layman I

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

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

How does random forest generate the forest? Additionally, why would we use it over other algorithms such as logistic regression?

What happens when you average the output on multiple decision trees?

What happens when you average the output on multiple decision trees?

Average Trees

Random Forest Explanation

What are the assumptions of linear regression?

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

Regression assumptions

Let’s say that you’re training a classification model.

How would you combat overfitting when building tree-based models?

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

Overfit Avoidance

What is the difference between Logistic and Linear Regression?

When would use one instead of the other in practice?

What is the difference between Logistic and Linear Regression?

Linear vs Logistic Regression

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

Addressing imbalanced data in machine learning through carefully prepared techniques.

Data Preparation for Imbalanced Data

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

Give an example of the tradeoffs between the two.

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

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

Bagging vs. Boosting

Bagging vs Boosting

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

Strategically resolving misaligned expectations with stakeholders for a successful project outcome

Stakeholder Communication

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

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.

Example:

Input:

<pre tabindex="0" class="chroma"><code>word1 = &#34;tree&#34;
word2 = &#34;radar&#34;
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>def is_palindrome(word1) -&gt; False
def is_palindrome(word2) -&gt; True
</code></pre>

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

String Palindromes

Write a SQL query to select the 2nd highest salary in the engineering department.

Note: If more than one person shares the highest salary, the query should select the next highest salary.

Example:

Input:

<code>employees</code> table

<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>
<code>departments</code> table

<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>
Output:

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

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

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.

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

Bias vs. Variance Tradeoff

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

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

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

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

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

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

Testing Price Increase

A/B Testing

Tell me about a project in which you had to clean and organize a large dataset.

Describing a real-world data cleaning and organization project

Data Cleaning Experiences

Analytics

What are the key differences between classification models and regression models?

What is the MOST important difference between regression and classification models?

What is the MOST important difference between regression and classification models?

Classification vs Regression

Classification and Regression

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.

Note: Can you do it on \(O(n)\) time?

Note: Even though there could be many solutions, only one needs to be returned.

Example 1:

Input:

<pre tabindex="0" class="chroma"><code>array = [1 2 3 4] 
target = 5 
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>def sum_pair_indices(array, target) -&gt; [0 3] or [1 2]
</code></pre>

Example 2:

Input:

<pre tabindex="0" class="chroma"><code>array = [3]
target = 6 
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>Do NOT return [0 0] as you can&#39;t use an index twice.
</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

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.

How would you assess the validity of the result?

Experiment Validity

How would you interpret coefficients of logistic regression for categorical and boolean variables?

Why is one-hot encoding recommended for categorical variables in logistic regression models?

Why is one-hot encoding recommended for categorical variables in logistic regression models?

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 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.

How would we build this model?

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?

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?

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.).

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

<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>

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

Note: Please return only one query with each number in a different row

Example:

Input:

<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>
Output:

<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

Let’s say you’re working on a random forest model.

If the number of trees in a random forest are increased sequentially, will the accuracy of the model continue to increase?

Random Forest Expansion

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

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

Example:

Input:

<pre tabindex="0" class="chroma"><code>N = 3
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>def prime_numbers(N) -&gt; [2,3]
</code></pre>

What are the logistic and softmax functions? What is the difference between the two?

What makes them useful for use in logistic regression?

In logistic regression, how is the predicted class determined based on the logistic function?

In logistic regression, how is the predicted class determined based on the logistic function?

Softmax vs Logistic II

What is the key characteristic of the logistic function that makes it useful for mapping continuous values to a probability?

What is the key characteristic of the logistic function that makes it useful for mapping continuous values to a probability?

Softmax vs Logistic I

What are the logistic and softmax functions? What is the difference between the two?

Softmax vs Logistic

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

Making data-driven insights actionable for those without technical expertise

Simple Explanations

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

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

Docs Metrics

Product Sense & Metrics

What’s the relationship between PCA and K-means clustering?

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

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

Input of K-means

PCA and K-Means

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.

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

Example 1:

Input:

<pre tabindex="0" class="chroma"><code>n = 5
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>fibonacci(n) -&gt; 5
</code></pre>

Example 2:

Input:

<pre tabindex="0" class="chroma"><code>n = 10
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>fibonacci(n) -&gt; 55
</code></pre>

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

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

Ruolo: Junior Machine Learning Engineer Luogo: Milano ALTEN supporta le strategie di sviluppo dei propri clienti nelle aree dell’innovazione, della R&D e dei sistemi informativi tecnologici. Nato più di 30 anni fa e presente in 30 Paesi, il Gruppo ALTEN si è affermato come leader mondiale nell’ingegneria e nei Servizi IT e leader Europeo per la consulenza nell'industria Life Sciences. Lavoriamo con attori chiave nei settori: Aeronautico &Spaziale, della Difesa & Navale, della Sicurezza, Automobilistico, Ferroviario, dell’Energia, del Life Sciences, Finanziario, del Retail e dei Servizi. Con un fatturato di oltre 4.069 miliardi di euro, abbiamo attualmente più di 57.400 collaboratori in tutto il mondo. In Italia siamo presenti in 13 città lungo tutto il territorio nazionale: Torino, Milano, Gallarate, Brescia, Genova, La Spezia, Modena, Maranello, Bologna, Firenze, Roma, Napoli e Bari. Di cosa ti occuperai: ll percorso formativo è finalizzato allo sviluppo di competenze avanzate nel campo dell’Intelligenza Artificiale, Machine Learning e Generative AI, con particolare attenzione all’applicazione di tali tecnologie a contesti aziendali e all’analisi dei dati.Il programma prevede inizialmente attività di Data Preprocessing, con tecniche per la gestione, pulizia e trasformazione di dati strutturati e non strutturati, finalizzate alla preparazione dei dataset per successive attività di analisi e modellazione.Successivamente il percorso approfondisce le tecnologie di Generative AI (GenAI), includendo lo studio e l’utilizzo di Large Language Models (LLMs), Vector Database, sviluppo di chatbot intelligenti e tecniche di Prompt Engineering per l’interazione efficace con modelli linguistici avanzati.Una parte significativa del percorso è dedicata allo sviluppo di AI Agents e sistemi basati su Retrieval-Augmented Generation (RAG), progettati per supportare processi aziendali complessi. Le applicazioni includono l’interrogazione intelligente di cataloghi e documentazione aziendale, l’analisi automatizzata di procedure e documenti, l’integrazione con sistemi CRM e la realizzazione di funzionalità avanzate come Text-to-SQL per l’accesso naturale ai dati.Il percorso affronta inoltre le tematiche relative al deployment di Large Language Models, con particolare attenzione all’installazione e gestione on-premise su infrastrutture GPU ad alte prestazioni, alla creazione di API ottimizzate per l’integrazione nei sistemi aziendali e alla gestione della validazione strutturata dei dati.Sono inoltre trattate tecniche di Natural Language Processing (NLP), tra cui analisi delle recensioni, sentiment analysis e topic modeling, utili per l’estrazione di insight da grandi volumi di dati testuali.Il programma comprende anche moduli di Machine Learning, con applicazioni pratiche di classificazione, regressione e clustering, e di Deep Learning per lo sviluppo di modelli predittivi avanzati.Infine, il percorso include attività di reportistica e data visualization, finalizzate alla comunicazione efficace dei risultati delle analisi attraverso dashboard e strumenti di visualizzazione dei dati. Requisiti: <ul><li>Laureando triennale/magistrale;</li><li>Conoscenza base di Python (librerie come NumPy, Pandas, Matplotlib);</li><li>Nozioni di statistica descrittiva e probabilità;</li><li>Comprensione dei concetti fondamentali di Machine Learning (classificazione, regressione, overfitting, train/test split);</li><li>Conoscenza base dei database relazionali e non relazionali;</li><li>Familiarità con ambienti come Jupyter Notebook o similari.</li></ul> Perché scegliere ALTEN? Technological challenges Crediamo che la tecnologia abbia un grande potenziale per migliorare il nostro futuro, per questo ricerchiamo talenti che siano motivati a costruire oggi il mondo di domani. Con il nostro portfolio clienti e i diversi progetti di R&D attivi, in ALTEN avrai modo di lavorare su progetti all'avanguardia. La nostra Technical Direction ti accompagnerà e indirizzerà durante il tuo percorso. Avrai la possibilità di metterti alla prova in contesti progettuali diversi e di confrontarti con esperti del settore per ampliare sempre più le tue conoscenze. Potrai unire le tue passioni e metterti in gioco professionalmente. Accetti la sfida? Inspiring Togetherness Ci impegniamo a favorire un ambiente di lavoro sereno e collaborativo organizzando attività di team building, iniziative di aggregazione, eventi sportivi, per conoscerci meglio e condividere momenti insieme. Il successo di un gruppo si fonda sulla cooperazione e condivisione reciproca del sapere e degli interessi. Fulfilling Opportunities In ALTEN troverai corsi formativi all’avanguardia per accrescere le tue competenze sia tecnologiche, sia linguistiche! Tramite ALTEN Academy potrai ottenere certificazioni con alcuni dei più importanti schemi internazionali come IREB®, ISTQB® e altri. Attraverso Aula Streaming, invece, avrai accesso a corsi di formazione più trasversali relativi a soft skills e potrai scegliere tra 12 corsi di lingua straniera. Sustainable commitment Crediamo che la tecnologia sia a supporto dello sviluppo sociale e della tutela ambientale. Oltre a collaborare a progetti che mirano alla sostenibilità, ci impegniamo a sostenere le cause che più abbiamo a cuore, avendo collaborato e collaborando, tra gli altri, con AISM, AIRC, LILT, Save the Children, Treedom, This Unique. Valorizziamo l'unicità e ci impegniamo a garantire che tutte le nostre persone abbiano pari opportunità all'interno della nostra azienda, fornendo loro gli strumenti per esprimere al massimo il proprio potenziale. Il nostro approccio alla diversità e all'inclusione si fonda sui principi di etica e integrità e rappresenta il fattore determinante per lo sviluppo di orizzonti di crescita personale e aziendale più ampi. Promuoviamo l'inserimento e l'integrazione lavorativa delle persone appartenenti alle categorie protette - in base a quanto disciplinato dalla legge 68/99. I prossimi step Una volta ricevuto il tuo cv, ci prenderemo il tempo necessario per valutarlo attentamente. Se sarà in linea con questa o con altre posizioni aperte all’interno del Gruppo, il nostro team Talent Acquisition ti contatterà telefonicamente per un primo confronto e programmerà un colloquio conoscitivo più approfondito.L’iter di selezione potrà proseguire con un test e un colloquio tecnico. L’ordine e il numero delle interviste potrebbero variare a seconda delle esigenze di selezione. In alternativa, saremo felici di conservare il tuo CV nel nostro gestionale per poterlo rivalutare per opportunità future. Operando in 13 diverse città e altrettanti settori, potrebbero contattarti più Talent Acquisition Partner e/o più Business Manager, se riterranno che il tuo profilo sia in linea con i progetti e le necessità che stanno ricercando in quel momento. Se dovessi identificare ulteriori offerte di tuo interesse e in linea con il tuo profilo, aspettiamo la tua candidatura per poterla valutare nuovamente. ALTEN opera nel rispetto dei principi di diversità, equità ed inclusione, che alimentano i nostri valori. ALTEN ha l’obiettivo di abbattere ogni barriera e pregiudizio, garantendo un ambiente di lavoro accessibile ed accogliente, valutando candidature indipendentemente da genere, etnia, disabilità (artt. 1 e 18, legge 68/99), età, orientamento sessuale, religione, stato civile, convinzioni personali e politiche, appartenenza ad organizzazioni sindacali, responsabilità familiari e back-ground socio-economico.

Ruolo: Embedded Software Engineer- Aerospace Luogo: Firenze ALTEN supporta le strategie di sviluppo dei propri clienti nelle aree dell’innovazione, della R&D e dei sistemi informativi tecnologici. Nato più di 30 anni fa e presente in 30 Paesi, il Gruppo ALTEN si è affermato come leader mondiale nell’ingegneria e nei Servizi IT e leader Europeo per la consulenza nell'industria Life Sciences. Lavoriamo con attori chiave nei settori: Aeronautico &Spaziale, della Difesa & Navale, della Sicurezza, Automobilistico, Ferroviario, dell’Energia, del Life Sciences, Finanziario, del Retail e dei Servizi. Con un fatturato di oltre 4.069 miliardi di euro, abbiamo attualmente più di 57.400 collaboratori in tutto il mondo. In Italia siamo presenti in 13 città lungo tutto il territorio nazionale: Torino, Milano, Gallarate, Brescia, Genova, La Spezia, Modena, Maranello, Bologna, Firenze, Roma, Napoli e Bari Di cosa ti occuperai: <ul><li>Progettazione e sviluppo di software embedded in C/C++ per sistemi aerospace</li><li>Sviluppo e manutenzione di firmware per dispositivi embedded impiegati in applicazioni avioniche e spaziali;</li><li>Integrazione software–hardware e supporto alle attività di debug, test e validazione secondo standard di settore;</li><li>Collaborazione con team multidisciplinari (hardware, sistema, verifica) per la definizione e il rispetto delle specifiche tecniche.</li></ul> Requisiti: <ul><li>Laurea Magistrale in Ingegneria Elettronica, Informatica, Aerospaziale o Telecomunicazioni;</li><li>Esperienza pregressa nello sviluppo software embedded;</li><li>Ottima conoscenza dei linguaggi C e C++ in ambiente embedded;</li></ul> Perché scegliere ALTEN? Technological challengesCrediamo che la tecnologia abbia un grande potenziale per migliorare il nostro futuro, per questo ricerchiamo talenti che siano motivati a costruire oggi il mondo di domani. Con il nostro portfolio clienti e i diversi progetti di R&D attivi, in ALTEN avrai modo di lavorare su progetti all'avanguardia. La nostra Technical Direction ti accompagnerà e indirizzerà durante il tuo percorso. Avrai la possibilità di metterti alla prova in contesti progettuali diversi e di confrontarti con esperti del settore per ampliare sempre più le tue conoscenze. Potrai unire le tue passioni e metterti in gioco professionalmente. Accetti la sfida? Inspiring TogethernessCi impegniamo a favorire un ambiente di lavoro sereno e collaborativo organizzando attività di team building, iniziative di aggregazionee, eventi sportivi, per conoscerci meglio e condividere momenti insieme. Il successo di un gruppo si fonda sulla cooperazione e condivisione reciproca del sapere e degli interessi. Fulfilling OpportunitiesIn ALTEN troverai corsi formativi all’avanguardia per accrescere le tue competenze sia tecnologiche, sia linguistiche! Tramite ALTEN Academy potrai ottenere certificazioni con alcuni dei più importanti schemi internazionali come IREB®, ISTQB® e altri. Attraverso Aula Streaming, invece, avrai accesso a corsi di formazione più trasversali relativi a soft skills e potrai scegliere tra 12 corsi di lingua straniera. Sustainable commitmentCrediamo che la tecnologia sia a supporto dello sviluppo sociale e della tutela ambientale. Oltre a collaborare a progetti che mirano alla sostenibilità, ci impegniamo a sostenere le cause che più abbiamo a cuore, avendo collaborato e collaborando, tra gli altri, con AISM, AIRC, LILT, Save the Children, Treedom, This Unique. Valorizziamo l'unicità e ci impegniamo a garantire che tutte le nostre persone abbiano pari opportunità all'interno della nostra azienda, fornendo loro gli strumenti per esprimere al massimo il proprio potenziale. Il nostro approccio alla diversità e all'inclusione si fonda sui principi di etica e integrità e rappresenta il fattore determinante per lo sviluppo di orizzonti di crescita personale e aziendale più ampi. Promuoviamo l'inserimento e l'integrazione lavorativa delle persone appartenenti alle categorie protette - in base a quanto disciplinato dalla legge 68/99. I prossimi step Una volta ricevuto il tuo cv, ci prenderemo il tempo necessario per valutarlo attentamente. Se sarà in linea con questa o con altre posizioni aperte all’interno del Gruppo, il nostro team Talent Acquisition ti contatterà telefonicamente. L’iter di selezione proseguirà con un colloquio conoscitivo con l'area Business, un successivo colloquio più approfondito, durante il quale potrebbe essere richiesto un test pratico, ed infine un colloquio tecnico. L’ordine e il numero delle interviste potrebbero variare a seconda delle esigenze di selezione. In alternativa, saremo felici di conservare il tuo CV nel nostro gestionale per poterlo rivalutare per opportunità future. Operando in 13 diverse città e altrettanti settori, potrebbero contattarti più Talent Acquisition Partner e/o più Business Manager, se riterranno che il tuo profilo sia in linea con i progetti e le necessità che stanno ricercando in quel momento. Se dovessi identificare ulteriori offerte di tuo interesse e in linea con il tuo profilo, aspettiamo la tua candidatura per poterla valutare nuovamente ALTEN opera nel rispetto dei principi di diversità, equità ed inclusione, che alimentano i nostri valori. ALTEN ha l’obiettivo di abbattere ogni barriera e pregiudizio, garantendo un ambiente di lavoro accessibile ed accogliente, valutando candidature indipendentemente da genere, etnia, disabilità (artt. 1 e 18, legge 68/99), età, orientamento sessuale, religione, stato civile, convinzioni personali e politiche, appartenenza ad organizzazioni sindacali, responsabilità familiari e back-ground socio-economico.

In this role, you'll contribute to the development of embedded solutions for high-tech environments, where timing, reliability, and efficiency are critical. You’ll collaborate with multidisciplinary teams and work on systems that demand deep technical insight. Qualifications : <ul><li>You completed a bachelor’s or master’s degree in IT or Engineering,</li><li>You are fluent in English,</li><li>At least 1 year of experience in designing, developing and maintaining software applications,</li><li>Strong analytical skills and the ability to handle complex technical problems,</li><li>Excellent communication skills and the ability to communicate effectively at all levels within the organization and with the customer,</li><li>A positive attitude and willingness to continue learning and growing.</li><li>Eligibility to the VIE program</li></ul> Your skills :<ul><li>Excellent command of the C language</li><li>Knowledge of C++ appreciated</li><li>Real-time operating systems (RTOS)</li><li>Communication protocols: SPI, I2C, UART</li><li>CI/CD tools: Git, Gerrit, Jenkins</li><li>Code review: Gitlab</li><li>Debugging interfaces: JTAG, Trace32, logic analyzers</li><li>Scripting languages: Python, MATLAB, Bash</li></ul>

Alten, la maison des ingénieurs, qui sommes-nous ? Fort de plus de 35 ans d’expériences, le groupe Alten exerce dans plus de 30 pays. Cette couverture mondiale, nos 54 000 collaborateurs, composés à 88 % d’ingénieurs, nous permettent d’être un groupe international et leader de son marché.Soucieux du bien-être de nos collaborateurs, cela nous a permis, cette année et pour la 12ème fois consécutive, d’être labélisé Top Employer. L’obtention de ce label s’appuie sur un audit du Top Employer Institute qui passe en revue un référentiel de 600 bonnes pratiques RH, garantissant le bien-être de chacun. Pourquoi nous ? Une démarche RSE forte : nos ingénieurs travaillent sur des projets qui contribuent à un avenir meilleur. ALTEN Group est signataire et membre de plusieurs programmes en faveur de l’environnement (Planet Tech’Care, La Charte de l’ingénierie, Climate Ambition Accelerator).Les compétences de nos ingénieurs au cœur des préoccupations : la montée en compétences de chacun est optimisée tout au long de votre parcours carrière.Culture d’entreprise élevée : Événements fédérateurs, actions solidaires, webinaires innovation, challenges variés… Faites l’expérience d’un environnement stimulant où vous pourrez partager vos talents et vos passions. Nous recherchons un Data Analyst Senior afin d’accompagner les équipes data dans l’analyse de données à grande échelle et la production d’insights stratégiques.Vous interviendrez sur des problématiques analytiques avancées, allant de l’exploration de données à la mise en place de dashboards et d’analyses complexes permettant d’orienter la prise de décision. Vos missions Au sein d’une équipe Data, vous serez en charge de :Analyse de données<ul><li>Concevoir et réaliser des analyses avancées à partir de datasets volumineux</li><li>Construire des plans d’analyse détaillés en fonction des besoins métiers</li><li>Vérifier la cohérence des résultats et les ordres de grandeur</li><li>Interpréter les résultats d’analyses complexes et formuler des recommandations claires</li></ul> Exploitation et transformation de la donnée<ul><li>Manipuler et interroger des données via SQL</li><li>Utiliser un langage de programmation Python ou R pour les analyses</li><li>Travailler sur des bases de données volumineuses (Big Data)</li></ul> Data Visualisation<ul><li>Concevoir des tableaux de bord et visualisations avancées</li><li>Utiliser des outils de datavisualisation tels que :</li><li>Tableau</li><li>Looker Studio</li></ul> Qualité et bonnes pratiques<ul><li>Appliquer les bonnes pratiques de développement :</li><li>tests de cohérence</li><li>documentation</li><li>commentaires de code</li><li>Assurer la traçabilité des analyses</li><li>Documenter les travaux réalisés :</li><li>périmètre d’analyse</li><li>période étudiée</li><li>type d’agrégation</li><li>logique analytique</li></ul> Collaboration et gestion des tâches<ul><li>Gérer les tâches de A à Z dans Jira</li><li>Maintenir une documentation technique et fonctionnelle permettant à l’équipe de reprendre facilement les analyses</li><li>Participer à l’amélioration continue des pratiques data</li></ul> Environnement technique<ul><li>SQL (maîtrise avancée)</li><li>Python ou R</li><li>Tableau</li><li>Looker Studio</li><li>Jira</li><li>GCP / BigQuery (préférable)</li><li>Hadoop / Spark (un plus)</li><li>Big Data</li></ul> Profil recherché<ul><li>Bac +5 en informatique, data, statistiques ou équivalent</li><li>5 à 8 ans d’expérience minimum en tant que Data Analyst</li><li>Excellente maîtrise de SQL</li><li>Très bonnes compétences en analyse de données et résolution de problèmes</li><li>Capacité à gérer des analyses complexes de manière autonome</li><li>Forte rigueur et sens de la documentation</li></ul> Serait un plus :<ul><li>Expérience GCP / BigQuery</li><li>Connaissances en Machine Learning</li><li>Expérience avec Hadoop / Spark</li></ul>

Aujourd’hui, nous sommes à la recherche d’un Data Engineer Senior pour rejoindre notre équipe dynamique et passionnée. Leader mondial de l’Ingénierie et du Conseil en Technologies, ALTEN offre des opportunités uniques pour développer vos compétences et évoluer dans un environnement stimulant. Fort de plus de 35 ans d’expérience, le groupe ALTEN est présent dans plus de 30 pays. Grâce à ses 57 000 collaborateurs, dont 88 % d’ingénieurs, ALTEN s’impose comme un acteur international majeur et un leader de son marché.Vous souhaitez relever des défis technologiques ambitieux aux côtés de grands acteurs des secteurs Industrie, Énergie, Défense, Banque, Assurance, Télécom, Media ou Retail, notamment autour de projets Data, BI, Big Data, IA, LLM/RAG ? Rejoignez-nous et contribuez à la réussite de projets data à fort impact. Pourquoi nous rejoindre ?<ul><li>Une démarche RSE forte : nos équipes interviennent sur des projets contribuant à un avenir plus durable. ALTEN Group est signataire et membre de plusieurs programmes engagés (Planet Tech’Care, Charte de l’ingénierie, Climate Ambition Accelerator).</li><li>Les compétences au cœur de nos priorités : accompagnement personnalisé, formations continues et évolution de carrière tout au long de votre parcours.</li><li>Une culture d’entreprise riche et stimulante : événements fédérateurs, actions solidaires, webinaires innovation, challenges techniques… un environnement propice au partage et à l’épanouissement professionnel.</li></ul> ???? Vos missions En tant que Data Engineer Senior, vous serez l’architecte des flux de données avancés, avec un focus sur les environnements Microsoft Azure, Dataiku, et les solutions LLM/RAG. Vos missions incluront :Conception & Développement de Pipelines<ul><li>Développer et industrialiser des pipelines ETL/ELT complexes en Python et SQL, intégrant des technologies modernes comme LLM/RAG.</li><li>Assurer la migration et l’intégration de données depuis des systèmes legacy vers des écosystèmes cloud, avec une expertise sur Microsoft Azure.</li></ul> Infrastructure & Architecture Cloud<ul><li>Mettre en œuvre et optimiser des solutions sur Microsoft Azure, en collaboration avec des outils comme Dataiku pour l’industrialisation des flux.</li><li>Automatiser le provisionnement des ressources (Infrastructure as Code) avec Terraform ou des outils équivalents.</li></ul> Optimisation & Qualité<ul><li>Optimiser la performance des requêtes et les coûts de stockage/calcul sur le Cloud, en particulier sur Microsoft Azure.</li><li>Mettre en place des tests automatisés et assurer le monitoring des flux de données, avec une attention particulière aux architectures LLM/RAG.</li></ul> Collaboration Agile<ul><li>Travailler en étroite collaboration avec les Data Scientists, Data Analysts et Product Owners pour industrialiser des solutions data-driven.</li><li>Participer activement à la culture DevOps et aux bonnes pratiques de software engineering.</li></ul> ✅ Profil recherché <ul><li>Diplômé(e) d’un Bac +5 (ingénierie informatique ou spécialisation Big Data).</li><li>7 ans d’expérience minimum en tant que Data Engineer, avec une expertise avérée sur :</li><li>Microsoft Azure (Data Factory, Databricks, Synapse, etc.).</li><li>Dataiku (industrialisation de flux, intégration avec des modèles LLM/RAG).</li><li>LLM/RAG (architecture, intégration, optimisation).</li><li>Une expérience significative dans le secteur industriel (férroviaire, automobile, énergie, etc.).</li><li>Maîtrise opérationnelle du développement Python et de la modélisation SQL.</li><li>Expérience confirmée en Infrastructure as Code (Terraform, ARM, etc.).</li><li>Connaissance des problématiques liées aux systèmes legacy (Teradata, etc.) est un atout.</li><li>Bilingue anglais primordiale pour évoluer dans un context internationale.</li><li>Mobile en Île-de-France et recherchant un poste en CDI.</li><li>Rigoureux(se), curieux(se) et technophile, vous aimez résoudre des problèmes techniques complexes et innover dans des environnements cloud avancés.</li></ul>

Alten, la maison des ingénieurs, qui sommes-nous ? Fort de plus de 35 ans d’expériences, le groupe Alten exerce dans plus de 30 pays. Cette couverture mondiale, nos 54 000 collaborateurs, composés à 88 % d’ingénieurs, nous permettent d’être un groupe international et leader de son marché.Soucieux du bien-être de nos collaborateurs, cela nous a permis, cette année et pour la 12ème fois consécutive, d’être labélisé Top Employer. L’obtention de ce label s’appuie sur un audit du Top Employer Institute qui passe en revue un référentiel de 600 bonnes pratiques RH, garantissant le bien-être de chacun. Pourquoi nous ? Une démarche RSE forte : nos ingénieurs travaillent sur des projets qui contribuent à un avenir meilleur. ALTEN Group est signataire et membre de plusieurs programmes en faveur de l’environnement (Planet Tech’Care, La Charte de l’ingénierie, Climate Ambition Accelerator).Les compétences de nos ingénieurs au cœur des préoccupations : la montée en compétences de chacun est optimisée tout au long de votre parcours carrière.Culture d’entreprise élevée : Événements fédérateurs, actions solidaires, webinaires innovation, challenges variés… Faites l’expérience d’un environnement stimulant où vous pourrez partager vos talents et vos passions. Nous recherchons un Data Scientist Junior pour intervenir au sein d’un grand groupe du secteur retail dans le cadre de la transformation analytique de ses activités marketing. L’objectif est de faire évoluer les stratégies promotionnelles vers une hyper-personnalisation des offres, en utilisant des modèles avancés de Machine Learning afin de proposer la bonne offre, au bon client, au bon moment.Vous interviendrez au sein d’une équipe dédiée aux promotions personnalisées, responsable de la conception des algorithmes qui pilotent les campagnes marketing de demain : coupons personnalisés, offres fidélité ciblées et recommandations produits. Vos missions Au sein de l’équipe Data, vous interviendrez notamment sur : Data Science & Machine Learning<ul><li>Concevoir et entraîner des modèles de Machine Learning permettant de prédire l’appétence des clients aux offres promotionnelles</li><li>Optimiser les investissements promotionnels grâce à l’analyse prédictive</li><li>Explorer, transformer et enrichir des datasets afin de les rendre exploitables pour les modèles</li></ul> Expérimentation & Performance<ul><li>Concevoir et analyser des protocoles A/B Testing pour mesurer l’impact réel des campagnes</li><li>Mettre en place une approche Test & Learn afin d’optimiser les performances marketing</li></ul> Industrialisation & MLOps<ul><li>Industrialiser la mise en production des modèles et assurer leur monitoring</li><li>Détecter les dérives de données et suivre les performances des modèles dans le temps</li><li>Contribuer à l’automatisation des pipelines data</li></ul> Environnement Cloud & Data Engineering<ul><li>Développer des traitements data en Python</li><li>Interroger et optimiser les datasets avec SQL / BigQuery</li><li>Déployer des solutions data sur Google Cloud Platform</li><li>Orchestrer des pipelines avec Airflow (Cloud Composer)</li><li>Conteneuriser les applications avec Docker</li><li>Déployer des workloads via Kubernetes</li><li>Gérer le versioning et la collaboration avec Git</li></ul> Environnement technique<ul><li>Python</li><li>SQL / BigQuery</li><li>GCP (Google Cloud Platform)</li><li>Docker</li><li>Kubernetes</li><li>Airflow / Cloud Composer</li><li>Git</li><li>A/B Testing</li><li>Machine Learning / MLOps</li><li>Méthodologies Agile / Scrum</li></ul> Profil recherché <ul><li>Bac +5 en école d’ingénieur ou formation universitaire équivalente (informatique, data science, IA, statistiques…)</li><li>0 à 3 ans d’expérience en tant que Data Scientist</li><li>Bonne maîtrise de Python et SQL</li><li>Expérience ou connaissances de GCP fortement appréciées</li><li>Connaissances en Machine Learning et expérimentation statistique</li><li>Sens de l’analyse et goût pour la résolution de problématiques data complexes</li><li>Esprit d’équipe et capacité à collaborer avec des profils métiers et techniques</li><li>Une expérience dans le retail / grande distribution serait un plus.</li></ul>

????.????.???? ???????????????????????? ???????????????????????????????? ???????????????????????????????? ???????????????? ????++ ???????????????????????????????????????? - ???????????????????????????????????? - ???????????????????? ???????????????????????????????????????????? The V.I.E (Volontariat International en Entreprise) program offers you the opportunity to work abroad for a period of up to 24 months, in a structured, secure and professionally enriching environment. Through this initiative supported by the French government, you can gain valuable international experience, develop new skills and contribute to exciting projects with our team in the Netherlands while benefiting from a monthly allowance and comprehensive social protection. Dare to take the plunge and start your international journey with us! ???????????? ????????????????????????????????As part of our continued growth, we are looking for a V.I.E Junior Software Engineer with C++ experience to join our team and contribute to ongoing client projects in Rotterdam As V.I.E Junior Software Engineer, your main tasks will include:<ul><li>support the development, testing, and maintenance of software applications using C++</li><li>collaborate with senior engineers, contribute to front-end and/or back-end development tasks, write clean and efficient code, fix bugs, and participate in code reviews</li><li>learn best practices, improving technical skills, and gaining hands-on experience in building reliable and scalable software solutions</li></ul> ???????????????? ????????????????????????????<ul><li>Completed Bachelor's Degree in Software Engineering, Computer Science and a relevant degree</li><li>1 to 2 years of experience in a similar role</li><li>Proficient in C++ (high-performance systems, embedded, real-time applications)</li><li>Fluent in English</li><li>Strong problem-solving skills</li><li>Knowledge on building scalable, maintainable systems</li><li>Comfortable working in collaborative, agile teams and hybrid settings</li></ul> ???????????? ???????????????????????????????????????????????? ???????????? ????.????.????. <ul><li>French or EU nationality with French Social Security Number</li><li>Must not have previously lived in the Netherlands</li><li>Under 28 years old</li></ul> Working conditions<ul><li>Temporary contract for 1 year - can be extended for one more year</li><li>Coverage of travel expenses for the relocation</li><li>Possibility of hybrid working</li><li>Monthly net salary of €3200</li><li>30 vacation days</li><li>Fully paid health insurance</li><li>Pension scheme without personal contribution</li></ul> Why join us?<ul><li>Exciting Projects Across Key Industries: Contribute to meaningful initiatives in sectors like defence, transport, telecom, and finance, where your expertise makes a real impact.</li><li>A Broad Range of Clients: Collaborate with both major companies and smaller players, offering you rich and varied professional experiences.</li><li>Focus on Career Development: Grow your skills through continuous training, industry events, and daily collaboration with top experts in your field.</li><li>A Culture of Innovation & Teamwork: Thrive in an environment that values creativity, encourages knowledge-sharing, and promotes collaborative success.</li></ul> About ALTENALTEN is a global leader in engineering and technology consulting, supporting top-tier clients in their innovation and R&D strategies. With over 57,000 employees in more than 30 countries, we operate across diverse sectors such as aerospace, automotive, telecom, finance, energy, and life sciences.ALTEN Nederland is a key entity within the ALTEN Group, with offices in Eindhoven, Capelle aan den IJssel, Apeldoorn, Groeningen and Amstelveen. Our 550+ consultants deliver high-value solutions in Technology and IT. For over 20 years in the Netherlands, we have contributed to impactful projects in high-tech, defence, transport, telecom, and finance, supporting companies in their technological transformation. Ready for your next challenge?Apply now and take part in exciting, high-impact projects at ALTEN Nederland!

Dans le cadre du développement de nos activités, nous recherchons un Business Analyst SAP FI/CO (F/H). En tant que Business Analyst, vous serez chargé d’analyser une organisation et de concevoir ses processus et systèmes, d’évaluer le modèle économique et son intégration avec la technologie. Vous évaluerez l’état actuel, identifierez les besoins du client et définirez l’état futur et/ou la solution métier. Une expertise confirmée en SAP FI CO est requise. Missions principales : - Développer des stratégies innovantes pour optimiser les processus et systèmes métiers - Collaborer avec des équipes pluridisciplinaires afin de mettre en place des solutions business - Exploiter l’analyse de données pour identifier des tendances et des opportunités d’amélioration - Animer des ateliers et des présentations pour communiquer vos constats et recommandations Profil recherché :De formation supérieure BAC +5 en Informatique, vous avez minimum 2 ans d’expérience.Autonome, organisé(e) et dynamique, doté(e) d’un fort gout de l’analyse et d’un bon esprit de synthèse, vous avez le sens du service client et vous aimez travailler en équipe ainsi que partager vos expériences. Qui sommes-nous ? ALTEN, Leader mondial de l'ingénierie et du conseil en technologies (ICT), soutient la stratégie de développement de ses clients dans les domaines de l'innovation, de la R&D et des systèmes d'information. En 2024, nous comptons plus de 50 000 collaborateurs répartis dans plus de 30 pays. ALTEN a réalisé un chiffre d’affaires de 4,07 milliards d’euros en 2023 et compte actuellement 57 000 collaborateurs, dont 90% sont des ingénieurs.Nous continuons d'étendre notre expertise pour accompagner les grandes entreprises industrielles et tertiaires dans leurs projets de transformation numérique et technologique.

V.I.E Junior Software Engineer with C++ experience - Eindhoven - ALTEN Netherlands The V.I.E (Volontariat International en Entreprise) program offers you the opportunity to work abroad for a period of up to 24 months, in a structured, secure and professionally enriching environment. Through this initiative supported by the French government, you can gain valuable international experience, develop new skills and contribute to exciting projects with our team in the Netherlands while benefiting from a monthly allowance and comprehensive social protection. Dare to take the plunge and start your international journey with us! The PositionAs part of our continued growth, we are looking for a V.I.E Junior Software Engineer with C++ experience to join our team and contribute to ongoing client projects in Eindhoven As V.I.E Junior Software Engineer, your main tasks will include:<ul><li>support the development, testing, and maintenance of software applications using C++</li><li>collaborate with senior engineers, contribute to front-end and/or back-end development tasks, write clean and efficient code, fix bugs, and participate in code reviews</li><li>learn best practices, improving technical skills, and gaining hands-on experience in building reliable and scalable software solutions</li></ul> Your Profile<ul><li>Completed Bachelor's Degree in Software Engineering, Computer Science and a relevant degree</li><li>1 to 2 years of experience in a similar role</li><li>Proficient in C++ (high-performance systems, embedded, real-time applications)</li><li>Fluent in English</li><li>Strong problem-solving skills</li><li>Knowledge on building scalable, maintainable systems</li><li>Comfortable working in collaborative, agile teams and hybrid settings</li></ul> The requirements for V.I.E. :<ul><li>French or EU nationality with French Social Security Number</li><li>Must not have previously lived in the Netherlands</li><li>Under 28 years old</li></ul> Working conditions<ul><li>Temporary contract for 1 year - can be extended for one more year</li><li>Coverage of travel expenses for the relocation</li><li>Possibility of hybrid working</li><li>Monthly net salary of €3200</li><li>30 vacation days</li><li>Fully paid health insurance</li><li>Pension scheme without personal contribution</li></ul> Why join us? <ul><li>Exciting Projects Across Key Industries: Contribute to meaningful initiatives in sectors like defence, transport, telecom, and finance, where your expertise makes a real impact.</li><li>A Broad Range of Clients: Collaborate with both major companies and smaller players, offering you rich and varied professional experiences.</li><li> Focus on Career Development: Grow your skills through continuous training, industry events, and daily collaboration with top experts in your field.</li><li>A Culture of Innovation & Teamwork: Thrive in an environment that values creativity, encourages knowledge-sharing, and promotes collaborative success.</li></ul> About ALTENALTEN is a global leader in engineering and technology consulting, supporting top-tier clients in their innovation and R&D strategies. With over 57,000 employees in more than 30 countries, we operate across diverse sectors such as aerospace, automotive, telecom, finance, energy, and life sciences.ALTEN Nederland is a key entity within the ALTEN Group, with offices in Eindhoven, Capelle aan den IJssel, Apeldoorn, Groeningen and Amstelveen. Our 550+ consultants deliver high-value solutions in Technology and IT. For over 20 years in the Netherlands, we have contributed to impactful projects in high-tech, defence, transport, telecom, and finance, supporting companies in their technological transformation.Ready for your next challenge?Apply now and take part in exciting, high-impact projects at ALTEN Nederland!

Calculate Moving Average	SQL	Easy
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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

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