Prepare for and practice interview questions from Corcentric.

Corcentric Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

Corcentric Interview Guides

<p>Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.</p>

<p>What factors could have biased this result, and what would you look into?</p>


<p>What could potentially bias the average boarding time in favor of an airline that only flies domestically?</p>

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

<p>You are testing hundreds of hypotheses with many <em>t</em>-tests. What considerations should be made?</p>


<p>What is a key disadvantage of the F-test when compared to multiple t-tests?</p>

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

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

<p>The schema below is for a retail online shopping company consisting of two tables, <code>attribution</code> and <code>user_sessions</code>.</p>

<ul>
<li><p>The attribution table logs a session visit for each row.</p></li>

<li><p>If <code>conversion</code> is <code>true</code>, then the user converted to buying on that session.</p></li>

<li><p>The <code>channel</code> column represents which advertising platform the user was attributed to for that specific session.</p></li>

<li><p>Lastly the <code>user_sessions</code> table maps many to one session visits back to one user.</p></li>
</ul>

<p>First touch attribution is defined as the channel with which the converted user was associated when they first discovered the website.</p>

<p>Calculate the first touch attribution for each <code>user_id</code> that converted. </p>

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

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

<p><code>attribution</code> table</p>

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

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

<tr>
<td><code>channel</code></td>
<td>VARCHAR</td>
</tr>

<tr>
<td><code>conversion</code></td>
<td>BOOLEAN</td>
</tr>
</tbody>
</table>
<p><code>user_sessions</code> table</p>

<table>
<thead>
<tr>
<th>column</th>
<th>type</th>
</tr>
</thead>

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

<tr>
<td><code>created_at</code></td>
<td>DATETIME</td>
</tr>

<tr>
<td><code>user_id</code></td>
<td>INTEGER</td>
</tr>
</tbody>
</table>
<p><strong>Example output:</strong></p>

<table>
<thead>
<tr>
<th><code>user_id</code></th>
<th><code>channel</code></th>
</tr>
</thead>

<tbody>
<tr>
<td>123</td>
<td>facebook</td>
</tr>

<tr>
<td>145</td>
<td>google</td>
</tr>

<tr>
<td>153</td>
<td>facebook</td>
</tr>

<tr>
<td>172</td>
<td>organic</td>
</tr>

<tr>
<td>173</td>
<td>email</td>
</tr>
</tbody>
</table>


First Touch Attribution

<h3>Job Description</h3><div>Job Description<div><p>As a Principal Software Engineer at Corcentric, you will join a driven, innovative team within an ambitious, entrepreneurial global organization. You will lead the design and implementation of modern, cloud-native applications. You will work with .NET microservices, Entity Framework Core, Kafka, AWS, Postgres, SignalR, Docker, Kubernetes, OpenTelemetry, and cXML, while also contributing to frontend solutions with JavaScript and React.js. This role combines hands-on coding, architecture leadership, and mentoring across multiple engineering teams.</p><p>This role is eligible for voluntary work-from-home consideration, with occasional travel to our Bethesda, MD office for onsite meetings. At this time, we are unable to consider candidates who require visa sponsorship for employment authorization. This includes individuals who currently hold temporary work authorization that is subject to expiration or who will require future sponsorship to maintain or extend their employment eligibility in the United States. </p><p>This key position reports to the VP, Software Development within our Product Engineering team. We’re a dedicated, down-to-earth group offering plenty of opportunity. We look forward to adding you into the mix!</p><p><strong>As a Principal Software Engineer, you will:</strong></p><ul><li>Design and implement .NET-based microservices with Entity Framework Core and Postgres.</li><li>Build real-time systems using SignalR.</li><li>Design and implement event-driven architectures with Apache Kafka.</li><li>Develop and integrate B2B solutions using cXML.</li><li>Lead adoption of AWS services, including Bedrock for AI/ML capabilities.</li><li>Containerize and orchestrate applications using Docker and Kubernetes.</li><li>Develop frontend solutions using JavaScript and React.js.</li><li>Implement observability and monitoring using OpenTelemetry.</li><li>Drive CI/CD best practices with GitHub Actions or similar tools.</li><li>Mentor engineers and define software engineering standards and best practices.</li></ul><p><strong>Requirements</strong></p><p><strong>You’ll need to have:</strong></p><ul><li>Undergraduate degree or equivalent experience required;</li><li>10+ years of experience in Solutions Architecture and Business Application development</li><li>Possess architectural hands on experience with microservices and distributed applications.</li><li>Possess strong technical experience with LAMP, distributed web application architectures, Laravel, Node, Amazon native messaging and cache technologies.</li><li>Possess experience with common distributed data tools in a production setting (Spark, Kafka, etc.).</li><li>Possess experience with search/indexing systems (such as ElasticSearch).</li><li>Possess experience architecting and automating cloud native technologies, CI/CD workflows and configuration management platforms.</li><li>Possess experience with service and flow orchestration and operationalization of the production system (monitoring, logging, alerting, tracing, etc.).</li><li>Possess experience with the full software development lifecycle and delivery using Agile practices.</li><li>Possess advanced knowledge of software engineering principles, methods, and techniques to include Agile/Scrum, DevOps and Continuous Integration / Continuous Delivery (CI/CD) methods.</li><li>Hands on experience with AI/ML</li></ul><p></p><p><strong>You’ll need to have:</strong></p><ul><li>10+ years of software engineering experience, with at least 5+ years in technical leadership or architecture roles.</li><li>Strong expertise in .NET Core / .NET 6+, Entity Framework Core, and microservices.</li><li>Hands-on experience with Kafka, SignalR, AWS, Postgres, Docker, Kubernetes, OpenTelemetry, cXML, JavaScript, React.js, and CI/CD.</li><li>Experience with cloud-native architecture, distributed systems, and observability practices.</li><li>Excellent problem-solving, communication, and mentoring skills.</li></ul><p><em>(We want to make sure you’re set up to succeed, and we view these as the critical skills you’ll need to achieve great things at Corcentric!) <br><br></em><strong>It’s great if you also have:</strong></p><ul><li>Master’s degree in Computer Science, Engineering, or related field.</li><li>Experience integrating AI/ML models in production systems.</li><li>Familiarity with infrastructure-as-code tools such as Terraform, AWS CDK, or CloudFormation.</li></ul><p><strong>Benefits</strong></p><p>At Corcentric, we know that the hard work of our employees is what drives the success of our organization. We care about who you are and what you value, both inside and outside of work. </p><p>Within our organization, you will have the opportunity to work with smart, collaborative team members and approachable leaders. Our down-to-earth, solutions-oriented culture means you'll have the opportunity to get hands-on with interesting work projects and be able to draw a short line from your contributions to business impacts. We prioritize professional development and encourage cross-functional promotional opportunities to enable you to reach your career goals. We have been in business for over 28 years and are thrilled to be actively growing and scaling our teams accordingly - it's an exciting environment and a great time to join. </p><p>Your compensation package upon joining Corcentric will be based on a variety of factors, including but not limited to your relevant professional experience and qualifications: your certifications, training, and educational achievements; your geographic location; and Corcentric business and organizational requirements. It is expected that the annual salary for this full-time role will be between $165,000 - $180,000, plus eligibility for our annual discretionary bonus program.</p><p>We also recognize the importance of work-life balance and want to support your efforts to take care of your health and well-being and the health and well-being of those who depend upon you. In support of this, we are proud to offer a comprehensive benefits package to our full-time team members, including: </p><ul><li>Generous annual paid time off program that increases with tenure</li><li>Eight paid holidays plus three personal holidays to recognize or celebrate an occasion that is important to you </li><li>An annual paid day off to volunteer for causes that are near and dear to you</li><li>Paid maternity, paternal/secondary caregiver, and adoptive parent leave</li><li>Company-paid life and disability insurance</li><li>401k program with a company match</li><li>Medical insurance plan options ranging from a traditional PPO to High Deductible Health Plan options that feature a company HSA contribution</li><li>Dental plan – including orthodontia coverage</li><li>Vision plan – including discount for LASIK surgery</li><li>All medical, dental, and vision insurance plans are available from the first of the month following your start date – no extended waiting period to be eligible!</li><li>A no-cost Employee Assistance Program - 24/7 access to confidential counseling services and a wide range of additional support and professional services</li></ul><p></p><p></p><p><strong>EEO Statement</strong></p><p><em>Our roles require routine use of standard office equipment, such as computers, keyboards, printers, phones, and filing cabinets. You may need to type, reach, and lift office materials of a reasonable weight. Travel may also be required based on job responsibilities and business needs.</em></p><p><em>Corcentric does not discriminate on the basis of race, sex, color, religion, age, national origin, marital status, disability, veteran status, genetic information, sexual orientation, gender identity or any other reason prohibited by law in provision of employment opportunities and benefits.</em></p><p></p><p><strong>Work Environment & Physical Demands</strong></p><p><em>This role routinely uses standard office equipment such as computers, phones, photocopiers, and filing cabinets. While performing the duties of this job, the employee is regularly required to see, talk, and hear. Willing and able to travel as required by job responsibilities and business needs. </em></p></div></div>

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
First Touch Attribution	SQL	Hard	Very High

Corcentric Interview Questions

Corcentric Interview Guides

Corcentric Interview Questions

Corcentric Opening Jobs