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Brooksource Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

Brooksource Interview Guides

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.

What factors could have biased this result, and what would you look into?

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

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?

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

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

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?

In an A/B test, how can you check if assignment to the various buckets was truly random?

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

Random Bucketing

A/B Testing & Experimentation

Brooksource Salaries by Position

Senior Data EngineerHybrid (Bethlehem, PA)Contract We’re looking for a Senior Data Engineer to join our growing technology team and help shape the future of our enterprise data landscape. This is a hands-on, high-impact opportunity to make recommendations, build and evolve a modern data platform using Snowflake and cloud-based EDW Solutions. How You’ll Impact Results: <ul><li>Drive the evolution and architecture of scalable, secure, cloud-native data platforms </li><li>Design, build, and maintain data models, pipelines, and integration patterns across the data lake, data warehouse, and consumption layers </li><li>Lead deployment of long-term data products and infuse data and analytics capabilities across business and IT </li><li>Optimize data pipelines and warehouse performance for accuracy, accessibility, and speed </li><li>Collaborate cross-functionally to deliver data, experimentation, and analytics solutions </li><li>Implement systems to monitor data quality and ensure reliability and availability of Production data for downstream users, leadership teams, and business processes </li><li>Recommend and implement best practices for query performance, storage, and resource efficiency </li><li>Test and clearly document data assets, pipelines, and architecture to support usability and scale </li><li>Engage across project phases and serve as a key contributor in strategic data architecture initiatives</li></ul> Your Qualifications That Will Ensure Success: Required: <ul><li>10+ years of experience in Information Technology Data Engineering: </li><li> professional database and data warehouse development </li><li>Advanced proficiency in SQL, data modeling, and performance tuning </li><li>Experience in system configuration, security administration, and performance optimization </li><li>Deep experience required with Snowflake and modern cloud data platforms (AWS, Azure, or GCP) </li><li>Familiarity with developing cloud data applications (AWS, Azure, Google Cloud) and/or standard CI/CD tools like Azure DevOps or GitHub </li><li>Strong analytical, problem-solving, and documentation skills </li><li>Experience in system configuration, security administration, and performance optimization </li><li>Proficiency with Microsoft Excel and common data analysis tools </li><li>Ability to troubleshoot technical issues and provide system support to non-technical users.</li></ul> Preferred: <ul><li>Experience integrating SAP ECC data into cloud-native platforms </li><li>Exposure to AI/ML, API development, or Boomi Atmosphere </li><li>Prior experience in consumer packaged goods (CPG), Food / Beverage industry, or manufacturing</li></ul>

Marketing Data & Measurement Business Analyst Location: Stamford, CT (Hybrid – 4 days onsite)Contract Type: W2 ContractorPay rate: $60-70 hourly Team OverviewOur client is seeking an experienced contractor to support a new marketing measurement product currently in adoption. This role sits between data analytics and business/product teams—leaning more toward the business side—and requires someone who is quantitative, consultative, and able to translate analytics into actionable marketing decisions. The ideal candidate has an analytics foundation, strong MMM/MTA experience, and comfort operating in a maturing team with ambiguity. This role supports marketing stakeholders driving budget allocation and subscriber growth. Responsibilities<ul><li>Lead discovery sessions to capture business requirements and translate them into use cases, success metrics, and BRDs.</li><li>Facilitate stakeholder engagement across marketing, analytics, finance, and product teams.</li><li>Serve as a subject-matter liaison on MMM/MTA concepts, capabilities, constraints, and tradeoffs.</li><li>Partner with analytics and TransUnion teams to align model inputs, assumptions, and outputs to business questions.</li><li>Define measurement frameworks, test designs, and KPI structures for channel and campaign decision-making.</li><li>Build and manage the MMM/MTA roadmap, milestones, dependencies, and delivery timelines.</li><li>Coordinate data readiness, sources, cadences, and ownership across internal teams and TransUnion.</li><li>Establish operating cadences (standups, stakeholder reviews, release checkpoints).</li><li>Document high-level processes, data dictionaries, and change-management steps; ensure governance and privacy compliance.</li><li>Support adoption and usage of the new measurement product across marketing teams.</li></ul> Required Qualifications<ul><li>5+ years of experience in marketing analytics, measurement, business analysis, or product-oriented roles.</li><li>Hands-on MMM/MTA experience or experience implementing or transitioning into these models.</li><li>Strong ability to translate analytics into business decisions for non-technical audiences.</li><li>Proven experience running requirement-gathering sessions and building measurement plans/roadmaps.</li><li>Background starting in data analytics and growing into business or product-focused responsibilities.</li><li>Strong project/program management skills (roadmapping, milestones, RAID tracking, stakeholder communication).</li><li>Experience partnering across marketing, media, analytics, finance, and data engineering.</li></ul> Preferred Qualifications<ul><li>Experience with TransUnion’s MMM/MTA solution.</li><li>Product management or product owner experience.</li><li>Experience with experimentation (geo tests, incrementality, lift studies).</li><li>Exposure to SQL, Python, or similar data tooling.</li><li>Experience with Agile/Scrum and tools such as Jira or Asana.</li></ul> EEO Statement:<ul><li>Eight Eleven Group provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, national origin, age, sex, citizenship, disability, genetic information, gender, sexual orientation, gender identity, marital status, amnesty or status as a covered veteran in accordance with applicable federal, state, and local laws.</li></ul>

Associate Software Engineer (Guidewire BillingCenter Developer)6-Month Contract-to-HireJacksonville, FL Brooksource is looking to hire recent college graduates to join one of our Fortune 1000 clients in Jacksonville, FL! This team will be part of a collaborative group of developers supporting enterprise insurance platforms and mission-critical applications as part of Brooksource’s Elevate Program. Elevate is Brooksource’s national associate-level consulting program that helps clients rejuvenate their workforce with a new wave of talent. Launched in 2000, we provide structured technical training and hands-on project experience to ensure a seamless transition into a professional environment. Associates build foundational engineering skills while developing into future technology leaders. In this role, you will work alongside senior developers, architects, and QA teams to help enhance and maintain the Guidewire BillingCenter platform. This role provides exposure to enterprise-grade applications, modern development practices, and real-world production systems. If you’re looking to jumpstart your software development career, this is a great opportunity to apply! Minimum Qualifications<ul><li>Bachelor’s Degree in Computer Science, Software Engineering, Information Technology, or a related field</li><li>Hands-on experience, coursework, or academic projects using:</li><li>Java and/or Spring Framework</li><li>JavaScript, HTML, and CSS</li><li>REST APIs and integration concepts</li><li>Basic understanding of:</li><li>Software Development Life Cycle (SDLC)</li><li>Agile and/or Waterfall methodologies</li><li>Version control systems such as Git</li><li>Familiarity with:</li><li>SQL and relational database concepts</li><li>Unit testing and basic test case development</li><li>Application logging and debugging concepts</li><li>Exposure to modern development tools and practices such as:</li><li>Jenkins or CI/CD concepts</li><li>Cloud platforms or cloud development fundamentals</li><li>Strong problem-solving skills and a desire to learn enterprise systems</li><li>Ability to collaborate effectively within a team environment</li></ul> Nice to Have<ul><li>Exposure to Guidewire platforms or enterprise insurance systems</li><li>Familiarity with Gosu or other object-oriented languages</li></ul> What’s In It For You?<ul><li>Working for a well-known, national Fortune 1000 company</li><li>Hands-on experience with enterprise platforms like Guidewire BillingCenter</li><li>Real-world exposure to large-scale application development</li><li>Collaboration with senior engineers, architects, and business stakeholders</li><li>Structured mentorship and training through Brooksource’s Elevate Program</li><li>Clear career path and professional growth opportunities</li><li>Supportive and team-oriented work environment</li></ul> If you are currently a senior studying Computer Science (or related field) or recently graduated, with:<ul><li>A graduation date in Fall, Spring or Summer of 2024/2025</li><li>A strong interest in backend or full-stack development</li><li>The ability to work or relocate to Jacksonville, FL</li><li>The ability to provide your own transportation to/from work every day</li><li>Authorization to work in the United States and will not require sponsorship now or in the future…then apply today!</li></ul>

Job Description:Junior Data Engineer Contract-to-Hire Columbus, OH (Hybrid) Our healthcare services client is looking for an entry-level Data Engineer to join their team. You will play a pivotal role in maintaining and improving inventory and logistics management programs. Your day-to-day work will include leveraging machine learning and open-source technologies to drive improvements in data processes. Job Responsibilities Automate key processes and enhance data quality Improve injection processes and enhance machine learning capabilities Manage substitutions and allocations to streamline product ordering Work on logistics-related data engineering tasks Build and maintain ML models for predictive analytics Interface with various customer systems Collaborate on integrating AI models into customer service Qualifications Bachelor's degree in related field 0-2 years of relevant experience Proficiency in SQL and Python Understanding of GCP/BigQuery (or any cloud experience, basic certifications a plus). Knowledge of data science concepts. Business acumen and understanding (corporate experience or internship preferred). Familiarity with Tableau Strong analytical skills Attitude for collaboration and knowledge sharing Ability to present confidently in front of leaders Why Should You Apply? You will be part of custom technical training and professional development through our Elevate Program! Start your career with a Fortune 15 company! Access to cutting-edge technologies Opportunity for career growth Eight Eleven Group provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, national origin, age, sex, citizenship, disability, genetic information, gender, sexual orientation, gender identity, marital status, amnesty or status as a covered veteran in accordance with applicable federal, state, and local laws.

Data Engineer – MDP Project6+ Month Contract Maple Grove, MN - Hybrid (3 days/week onsite) Our client is seeking a data engineering contractor to join our team and help build and maintain the existing marketing data warehouse. This role will build DBT models in a medallion style data mart that combines 10+ data sources and transform them into a holistic model to allow marketing teams to derive actionable insights. Responsibilities: <ul><li>Collaborate with cross-functional teams to ingest, maintain, and deliver analytics data. </li><li>Develop and maintain data ingestion and transformation processes within Snowflake using SQL and DBT. </li><li>Develop datasets to support ad-hoc analytical needs and reporting. </li><li>Monitor data pipelines to ensure data is captured and processed accurately and on time. </li><li>Ensure that all processes for receiving, processing, and evaluating data are efficient, replicable and documented. </li><li>Perform validation and testing of data transformations and automated jobs to ensure quality data. </li><li>Fulfill ad-hoc requests and data processing needs. </li><li>Comply with all required internal governance and data privacy requirements </li></ul> Required Qualifications: <ul><li>5+ years professional work experience with relational data models and databases. </li><li>Strong Experience with the Snowflake, DBT, AWS. </li><li>Strong SQL experience focused on data transformation, cleansing, and preparation. </li><li>Experience documenting data processes. </li><li>Collaborative team-player </li><li>Strong ability to multi-task and balance competing priorities effectively. </li><li>Experience working with highly regulated industries. </li></ul> Preferred Qualifications: <ul><li>Bachelor’s degree in IT, software engineering or related fields. </li><li>Healthcare data experience </li><li>Marketing data experience </li></ul> ABOUT EIGHT ELEVEN GROUP:At Eight Eleven, our business is people. Relationships are at the center of what we do. A successful partnership is only as strong as the relationship built. We’re your trusted partner for IT hiring, recruiting and staffing needs. For over 16 years, Eight Eleven has established and maintained relationships that are designed to meet your IT staffing needs. Whether it’s contract, contract-to-hire, or permanent placement work, we customize our search based upon your company's unique initiatives, culture and technologies. With our national team of recruiters placed at 21 major hubs around the nation, Eight Eleven finds the people best-suited for your business. When you work with us, we work with you. That’s the Eight Eleven promise. Eight Eleven Group provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, national origin, age, sex, citizenship, disability, genetic information, gender, sexual orientation, gender identity, marital status, amnesty or status as a covered veteran in accordance with applicable federal, state, and local laws.

Job Description:Junior Data Analyst 12 Month Contract-to-Hire Columbus, OH $28/hr Our healthcare services client is seeking a driven entry-level Data Analyst to join their Financial Planning and Analysis team. In this role, you will support key financial analytics initiatives that guide decision-making for internal business partners. This is an excellent opportunity to gain exposure to senior leadership, strengthen your technical toolkit, and accelerate your career through our Elevate Program, which offers structured training and development. Qualifications:Bachelor's degree in Data Analytics, MIS, CIS, or a related fieldHands-on SQL experienceHands-on Python experience Experience with data querying and analysisProficiency with Tableau or other data visualization toolsStrong written and verbal communication skills Job Responsibilities: Support financial planning and analysis activities alongside the analytics team Attend and contribute to project intake and requirements meetings Analyze data to identify trends and deliver actionable insights to partners Communicate findings with business stakeholders, senior leadership, and analytics teams Collaborate closely with senior Data Analysts on high-impact projects Why Should You Apply? Receive mentorship and support from experienced team members Access tailored technical training and professional growth through our Elevate Program Build your career with a Fortune 15 organization known for investing in early-career talent Eight Eleven Group provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, national origin, age, sex, citizenship, disability, genetic information, gender, sexual orientation, gender identity, marital status, amnesty or status as a covered veteran in accordance with applicable federal, state, and local laws.

Job Description:Data Analyst Hybrid - Tues &amp; Wed On-site in Lake Mary, FL Brooksource is looking for a detail-oriented and dedicated individual to support our Specialty Pharmacy Distribution client and support their Customer Master domain. This person will be responsible for working with client accounts and updating/maintaining as needed. Responsibilities:Accurately enter and update customer data in the SAP system.Maintain and manage customer master data, ensuring data integrity and consistency.Verify and validate data entries for accuracy and completeness.Collaborate with cross-functional teams to resolve data discrepancies and ensure timely updates.Generate and analyze reports to identify and correct data issues.Assist in the development and implementation of data entry procedures and guidelines.Provide support for data migration and integration projects.Ensure compliance with company policies and data management standards. Qualifications:High school diploma or equivalent; additional certification in data entry or related field is a plus.Proven experience in data entry, preferably within the SAP environment.Familiarity with Customer Master data management.Strong attention to detail and accuracy.Excellent organizational and time management skills.Proficient in Microsoft Office Suite (Excel, Word, Outlook).Ability to work independently and as part of a team.Strong communication skills, both written and verbal. Preferred Skills:Experience with SAP modules related to Customer Master data.Knowledge of data governance and data quality principles.Ability to troubleshoot and resolve data-related issues.

Position Title: Software Development Engineer (Python)Location: Middletown, NJ (5 days onsite)Contract type: Long term contractPay rate: $45-55 hourly (based on years of experience) Overview / Team Summary:Brooksource is seeking a Software Development Engineer (Python) to join our client’s technical team focused on automation infrastructure and systems integration. This role involves building Python-based tools, developing CI/CD pipelines, designing REST APIs, and supporting full-stack development where needed. The ideal candidate is adaptable, collaborative, and enjoys solving complex technical challenges in a fast-paced environment. This position offers exposure to modern development practices, network automation, and integration with backend systems. Responsibilities:<ul><li>Develop Python-based backend services and automation frameworks supporting networking systems (routers, switches).</li><li>Design, build, and maintain RESTful APIs and microservices for internal and external integrations.</li><li>Support and optimize CI/CD pipelines for development and deployment efficiency.</li><li>Collaborate with cross-functional teams to support both frontend and backend components.</li><li>Interface with SQL/NoSQL databases for data storage, retrieval, and analytics.</li><li>Write clean, maintainable, and well-documented code following best practices.</li><li>Ensure backend systems are secure, reliable, and performant.</li><li>Quickly adapt to new technologies and evolving project requirements.</li></ul> Required Skills & Qualifications:<ul><li>5+ years of hands-on experience in Python development.</li><li>Strong knowledge of object-oriented programming (OOP), decorators, generators, and context managers.</li><li>Experience with multi-threading, asynchronous programming, and performance optimization.</li><li>Proficiency in error handling, logging, and testing frameworks.</li><li>Hands-on experience with CI/CD tools and automation workflows.</li><li>Proven ability to design and implement REST APIs.</li><li>Solid understanding of database systems (e.g., MySQL, InfluxDB).</li><li>Ability to thrive in a fast-paced, agile environment.</li><li>Excellent communication and collaboration skills.</li></ul> Preferred Skills:<ul><li>Prior experience in network automation involving routers and switches.</li><li>Knowledge of networking protocols and configuration automation.</li><li>Experience with containerization and orchestration (e.g., Docker, Kubernetes).</li></ul> What’s in it for you:<ul><li>Work on automation infrastructure and backend systems supporting high-impact projects.</li><li>Collaborate with experienced engineers and cross-functional teams in a dynamic environment.</li><li>Opportunity to expand technical skills in Python, CI/CD, APIs, microservices, and network automation.</li><li>Exposure to modern development practices and large-scale system integration.</li></ul>

Job Description:Data Analyst Hybrid - Tues & Wed On-site in Lake Mary, FL Brooksource is looking for a detail-oriented and dedicated individual to support our Specialty Pharmacy Distribution client and support their Customer Master domain. This person will be responsible for working with client accounts and updating/maintaining as needed. Responsibilities:Accurately enter and update customer data in the SAP system.Maintain and manage customer master data, ensuring data integrity and consistency.Verify and validate data entries for accuracy and completeness.Collaborate with cross-functional teams to resolve data discrepancies and ensure timely updates.Generate and analyze reports to identify and correct data issues.Assist in the development and implementation of data entry procedures and guidelines.Provide support for data migration and integration projects.Ensure compliance with company policies and data management standards. Qualifications:High school diploma or equivalent; additional certification in data entry or related field is a plus.Proven experience in data entry, preferably within the SAP environment.Familiarity with Customer Master data management.Strong attention to detail and accuracy.Excellent organizational and time management skills.Proficient in Microsoft Office Suite (Excel, Word, Outlook).Ability to work independently and as part of a team.Strong communication skills, both written and verbal. Preferred Skills:Experience with SAP modules related to Customer Master data.Knowledge of data governance and data quality principles.Ability to troubleshoot and resolve data-related issues.

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
Random Bucketing	A/B Testing & Experimentation	Medium	Very High

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