Prepare for and practice interview questions from Interactive Brokers.

Interactive Brokers Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

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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?

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

A/B Testing & Experimentation

Interactive Brokers Salaries by Position

<h3>Job Description</h3><div>Job Description<div><div>Company OverviewInteractive Brokers Group, Inc. (Nasdaq: IBKR) is a global financial services company headquartered in Greenwich, CT, USA, with offices in over 15 countries. We have been at the forefront of financial innovation for over four decades, known for our cutting-edge technology and client commitment.IBKR affiliates provide global electronic brokerage services around the clock on stocks, options, futures, currencies, bonds, and funds to clients in over 200 countries and territories. We serve individual investors and institutions, including financial advisors, hedge funds and introducing brokers. Our advanced technology, competitive pricing, and global market help our clients to make the most of their investments.Barron's has recognized Interactive Brokers as the #1 online broker for six consecutive years. Join our dynamic, multi-national team and be a part of a company that simplifies and enhances financial opportunities using state-of-the-art technology.</div>About INTERACTIVE BROKERS!This is a hybrid role (three days in the office/two days remote).Interactive Brokers Group has been consistently at the forefront of trading innovation, starting with the invention of the first floor-based handheld computer in 1983. We pride ourselves on being primarily a technology company and challenging the status quo. We push boundaries to offer our clients the best trading platform with the most sophisticated features at the lowest cost. Software development is the lifeblood of our firm, and it shows in our stellar brokerage platform. Interactive Brokers is regularly recognized as a leader in the financial services industry.About Your Team:As a Senior DevOps Engineer, you will be a member of the Enterprise Architecture organization and responsible for ensuring the availability, scalability, and reliability of systems and applications.What will be your responsibilities within IBKR: <ul><li>Write and review code, develop documentation and capacity plans, and conduct proof-of-concept work on new technologies.</li><li>Design, implement, and maintain CI/CD pipelines to ensure efficient and reliable build and release processes.</li><li>Serve as an escalation contact for service incidents as part of an on-call rotation.</li><li>Develop and maintain infrastructure-as-code using tools like Terraform or CloudFormation.</li><li>Mentor junior engineers and provide technical guidance.</li><li>Stay up-to-date with industry trends and emerging technologies.</li></ul>Which skills are required:<ul><li>Bachelor's or Master's degree in computer science or other STEM-related field.</li><li>5+ years of experience in Linux/Unix systems and networking fundamentals.</li><li>5+ years of coding experience.</li><li>Experience with cloud platforms (AWS or Azure).</li><li>Experience with infrastructure-as-code tools (Terraform or CloudFormation).</li><li>Excellent skills in problem-solving and communication, both verbal and written.</li></ul>To be successful in this position, you will have the following:<ul><li>Experience in a highly regulated industry such as health care or finance.</li><li>Experience with agile methodologies.</li><li>Experience with containerization technologies, such as Docker and Kubernetes.</li><li>Experience in application software development</li></ul>Company Benefits & Perks<ul><li>Competitive salary, annual performance-based bonus and stock grant</li><li>Retirement plan 401(k) with a competitive company match</li><li>Excellent health and wellness benefits, including medical, dental, and vision benefits, and a company-paid medical healthcare premium.</li><li>Wellness screenings and assessments, health coaches and counseling services through an Employee Assistance Program (EAP)</li><li>Paid time off and a generous parental leave policy</li><li>Daily company lunch allowance provided, and a fully stocked kitchen with healthy options for breakfast and snack</li><li>Corporate events, including team outings, dinners, volunteer activities and company sports teams</li><li>Education reimbursement and learning opportunities</li><li>Modern offices with multi-monitor setups</li></ul></div></div>

<h3>Job Description</h3><div>Job Description<div><div>Company OverviewInteractive Brokers Group, Inc. (Nasdaq: IBKR) is a global financial services company headquartered in Greenwich, CT, USA, with offices in over 15 countries. We have been at the forefront of financial innovation for over four decades, known for our cutting-edge technology and client commitment.IBKR affiliates provide global electronic brokerage services around the clock on stocks, options, futures, currencies, bonds, and funds to clients in over 200 countries and territories. We serve individual investors and institutions, including financial advisors, hedge funds and introducing brokers. Our advanced technology, competitive pricing, and global market help our clients to make the most of their investments.Barron's has recognized Interactive Brokers as the #1 online broker for six consecutive years. Join our dynamic, multi-national team and be a part of a company that simplifies and enhances financial opportunities using state-of-the-art technology.</div>This is a hybrid role (3 days in the office/2 days remote).Job Summary: Develop our comprehensive data processing pipeline transforming on-premises Kafka streams into both actionable business insights and regulatory compliance reports through AWS cloud services (S3, Glue, Athena, EMR). Design robust ETL processes and build automated, scalable data solutions aligned with our zero-maintenance vision, delivering high-quality outputs for both business decision-making and regulatory requirements.About your team:<div>We are the Realtime Order Analytics and Reporting team, a dynamic group focused on transforming financial transaction data into valuable business intelligence and regulatory reporting. Our team:</div><ul><li>Works with cutting-edge technologies, including AWS cloud services and realtime data processing</li><li>Operates in a collaborative environment where innovation and ideas are encouraged</li><li>Maintains a balance between technical excellence and business impact</li><li>Values automation and efficiency in all our solutions</li><li>Fosters continuous learning and professional development</li><li>Plays a critical role in supporting business decision-making and ensuring regulatory compliance</li><li>Embraces agile methodologies to deliver high-quality solutions efficiently</li></ul><div>We're looking for someone who shares our passion for data engineering and wants to make a significant impact by turning complex financial data into actionable insights.</div>What will be your responsibilities within IBKR: <ul><li>Designing, developing, and maintaining ETL workflows using AWS services</li><li>Processing data from Kafka streams and S3 storage to generate insights</li><li>Implementing data transformation logic using Python, PySpark, and PyAthena</li><li>Creating and optimizing data models for both analytical and regulatory reporting needs</li><li>Building automated data quality checks and monitoring systems</li><li>Developing and maintaining documentation for data pipelines and processes</li><li>Troubleshooting and resolving data pipeline issues</li><li>Contributing to architectural decisions for data infrastructure</li><li>Ensuring data solutions meet performance, security, and compliance requirements</li><li>Continuously improving our data systems for scalability and reduced maintenance</li></ul> Which skills are required:<ul><li>Bachelor's or master's degree in Computer Science or a related field</li><li>3+ years of professional software engineering experience in Python, PySpark and PyAthena</li><li>3+ years of professional experience in Python as a primary language (non-scripting)</li><li>Extensive experience in Pandas or NumPy</li><li>Experience with ETL processes and data warehousing concepts</li><li>Familiarity with cloud technologies, particularly AWS (S3, Glue, Athena, EMR)</li><li>Experience using ELK Stack (Elasticsearch, Logstash, Kibana)</li><li>Thorough understanding of databases and SQL</li><li>1+ years of professional experience with Linux operating systems</li><li>An analytical mind and business acumen</li><li><div>Strong communication skills</div></li></ul>Good to have: <ul><li>Experience with financial markets or the brokerage industry</li><li>Experience with business intelligence tools, especially Tableau</li><li>Experience with version control systems (e.g., Git, BitBucket)</li><li>Experience with CI/CD Practices and Tools</li></ul> To be successful in this position, you will have the following:<ul><li>Self-motivated and able to handle tasks with minimal supervision.</li><li>Superb analytical and problem-solving skills.</li><li>Excellent collaboration and communication (Verbal and written) skills.</li><li>Outstanding organizational and time management skills.</li></ul>Company Benefits & Perks<div><ul><li>Competitive salary, annual performance-based bonus and stock grant</li><li>Retirement plan 401(k) with competitive company match</li><li>Excellent health and wellness benefits, including medical, dental, and vision benefits, and a company-paid medical healthcare premium.</li><li>Wellness screenings and assessments, health coaches and counseling services through an Employee Assistance Program (EAP)</li><li>Paid time off and a generous parental leave policy</li><li>Daily company lunch allowance provided, and a fully stocked kitchen with healthy options for breakfast and snacks</li><li>Corporate events, including team outings, dinners, volunteer activities and company sports teams</li><li>Education reimbursement and learning opportunities</li><li>Modern offices with multi-monitor setups</li></ul></div></div></div>

<h3>Job Description</h3><div>Job Description<div><div>Company OverviewInteractive Brokers Group, Inc. (Nasdaq: IBKR) is a global financial services company headquartered in Greenwich, CT, USA, with offices in over 15 countries. We have been at the forefront of financial innovation for over four decades, known for our cutting-edge technology and client commitment.IBKR affiliates provide global electronic brokerage services around the clock on stocks, options, futures, currencies, bonds, and funds to clients in over 200 countries and territories. We serve individual investors and institutions, including financial advisors, hedge funds and introducing brokers. Our advanced technology, competitive pricing, and global market help our clients to make the most of their investments.Barron's has recognized Interactive Brokers as the #1 online broker for six consecutive years. Join our dynamic, multi-national team and be a part of a company that simplifies and enhances financial opportunities using state-of-the-art technology.</div>This is a hybrid role (3 days in the office/2 days remote).About Your Team:Our Financial Crimes Surveillance team seeks a Senior Data Engineer to play a critical role in protecting the financial system. You'll architect, implement, optimize, and maintain sophisticated data pipelines that power real-time and batch surveillance models that pinpoint fraud, market manipulation, and money laundering across our platform.The Scale & Impact:<ul><li>Process 1+ billion order events and 5+ million trades daily</li><li>Protect 3.5+ million client accounts</li><li>Direct impact on financial security and regulatory compliance</li></ul>What will be your responsibilities within IBKR: <ul><li>Data Architecture & Stewardship<ul><li>Own and curate dozens of mission-critical datasets that drive surveillance operations.</li><li>Design, build, and automate robust data pipelines supporting real-time and batch processing.</li><li>Develop advanced data quality frameworks to proactively identify issues before they impact operations.</li></ul></li><li>Cross-Functional Partnership<ul><li>Collaborate with quantitative engineers and surveillance model developers to translate complex business requirements into scalable data solutions.</li><li>Transform high-level surveillance concepts into production-ready processes that deliver actionable insights.</li></ul></li><li>Technical Excellence<ul><li>Build an analytical infrastructure enabling seamless data exploration and visualization</li><li>Optimize data architectures and databases for maximum performance and reliability</li><li>Create developer tooling that accelerates pipeline development and monitoring</li><li>Ensure data accuracy, security, and compliance with regulatory standards</li></ul></li><li>Innovation & Optimization<ul><li>Continuously enhance system reliability, performance, and efficiency</li><li>Load and format datasets for optimal consumption by quantitative researchers and ML models</li><li>Drive best practices in data governance and privacy protection</li></ul></li></ul> Which skills are required:<ul><li>5+ years of professional software engineering with a focus on data pipeline development (Python or Java)</li><li>3+ years of production Python experience beyond scripting</li><li>Expert-level proficiency in Pandas or Polars</li><li>1-3 years of hands-on Linux systems experience</li><li>Deep understanding of databases and SQL optimization</li><li>Bachelor's or master's degree in computer science or a related technical field</li></ul>Preferred Qualifications:<ul><li>Financial services or fintech background</li><li>Proficiency in C++ or Java</li><li>Advanced degree (Master's/PhD)</li></ul> To be successful in this position, you will have:<ul><li>Self-motivation and able to handle tasks with minimal supervision.</li><li>Superb analytical and problem-solving skills.</li><li>Excellent collaboration and communication (Verbal and written) skills.</li><li>Outstanding organizational and time management skills.</li></ul>Company Benefits & Perks<div><ul><li>Competitive salary, annual performance-based bonus and stock grant</li><li>Retirement plan 401(k) with competitive company match</li><li>Excellent health and wellness benefits, including medical, dental, and vision benefits, and a company-paid medical healthcare premium.</li><li>Wellness screenings and assessments, health coaches and counseling services through an Employee Assistance Program (EAP)</li><li>Paid time off and a generous parental leave policy</li><li>Daily company lunch allowance provided, and a fully stocked kitchen with healthy options for breakfast and snacks</li><li>Corporate events, including team outings, dinners, volunteer activities and company sports teams</li><li>Education reimbursement and learning opportunities</li><li>Modern offices with multi-monitor setups</li></ul></div></div></div>

<h3>Job Description</h3><div>Job Description<div><div>Company OverviewInteractive Brokers Group, Inc. (Nasdaq: IBKR) is a global financial services company headquartered in Greenwich, CT, USA, with offices in over 15 countries. We have been at the forefront of financial innovation for over four decades, known for our cutting-edge technology and client commitment.IBKR affiliates provide global electronic brokerage services around the clock on stocks, options, futures, currencies, bonds, and funds to clients in over 200 countries and territories. We serve individual investors and institutions, including financial advisors, hedge funds and introducing brokers. Our advanced technology, competitive pricing, and global market help our clients to make the most of their investments.Barron's has recognized Interactive Brokers as the #1 online broker for six consecutive years. Join our dynamic, multi-national team and be a part of a company that simplifies and enhances financial opportunities using state-of-the-art technology.</div>This is a hybrid role (3 days in office / 2 days remote)Interactive Brokers seeks a motivated data professional to support its Data Governance program. The Senior Data Analyst – Compliance will be responsible for researching and documenting data lineage from a regulatory compliance perspective to support global broker-dealer reporting requirements. This is a compliance role that will work closely with the data governance team and other functions as required.Responsibilities:<ul><li>Identify key data elements and create and maintain data lineage maps by collaborating with technical and business stakeholders</li><li>Create and maintain data policies and procedures, and develop compliance solutions that satisfy relevant broker-dealer regulations</li><li>Create source-to-destination data maps for AML reports and systems</li><li>Support the buildout and management of the data catalog, business glossaries, and associated metadata that serve as the enterprise repository for understanding and governing information across the organization</li><li>Design periodic and ad hoc supervisory reports and complete associated reviews</li><li>Implement internal control enhancements and appropriately triage potential compliance matters</li><li>Assist and coordinate responses to regulatory inquiries from U.S. and global regulators</li><li>Draft and implement controls and perform control testing</li><li>Research and write policies and procedures</li></ul>Qualifications:<ul><li>5+ years of experience at a financial services company, auditor, or regulator</li><li>3+ years of experience performing or auditing middle- and back-office functions at a broker-dealer, investment manager, hedge fund, or bank</li><li>Experience analyzing and documenting data flows and entity relationships (e.g., DFD, ERD)</li><li>Solid academic background with a bachelor's or master's degree in Finance, Business, Economics, Computer Science, Data Science, or Information Systems preferred</li><li>Knowledge of information systems, software development, NLP, Python, UNIX, SQL, and databases is a plus</li><li>Knowledge of data catalog, lineage, and data quality tools</li><li>Fluent with MS Office tools, particularly Excel (e.g., Power Query, VBA) and Visio (e.g., UML and BPMN diagrams)</li><li>Ability to work independently in a small-team environment and multitask with minimal supervision</li></ul>Preferred Qualifications:<ul><li>Bachelor's or master's degree in Finance, Accounting, Business, Economics, Computer Science, Data Science, or Information Systems</li><li>Business analysis and/or project management experience</li><li>Understanding of financial compliance data</li><li>Exposure to U.S. and foreign regulations relevant to broker-dealers</li><li>High comfort and fluency with computers and technology, and understanding of how technology is applied to business and regulatory problems</li><li>Experience with Linux and SQL</li><li>Experience with data catalog, data lineage, MDM, and/or taxonomy tools</li><li>Working knowledge of one or more programming or scripting languages (Python, Java, JavaScript, Perl, etc.)</li><li>Working knowledge of XML and/or JSON is a plus</li></ul>To be successful in this position, you will have the following:<ul><li>Self-motivated and able to handle tasks with minimal supervision</li><li>Superb analytical and problem-solving skills</li><li>Excellent collaboration and communication (verbal and written) skills</li><li>Outstanding organizational and time management skills</li></ul>Company Benefits & Perks<ul><li>Competitive salary, annual performance-based bonus, and stock grant</li><li>Retirement plan 401(k) with competitive company match</li><li>Excellent health and wellness benefits, including medical, dental, and vision coverage; company-paid medical healthcare premium</li><li>Wellness screenings and assessments, health coaches, and counseling services through an Employee Assistance Program (EAP)</li><li>Paid time off and a generous parental leave policy</li><li>Daily company lunch allowance and a fully stocked kitchen with healthy options for breakfast and snacks</li><li>Corporate events, including team outings, dinners, volunteer activities, and company sports teams</li><li>Education reimbursement and learning opportunities</li><li>Modern offices with multi-monitor setups</li></ul></div></div>

<h3>Job Description</h3><div>Job Description<div><div>Company OverviewInteractive Brokers Group, Inc. (Nasdaq: IBKR) is a global financial services company headquartered in Greenwich, CT, USA, with offices in over 15 countries. We have been at the forefront of financial innovation for over four decades, known for our cutting-edge technology and client commitment.IBKR affiliates provide global electronic brokerage services around the clock on stocks, options, futures, currencies, bonds, and funds to clients in over 200 countries and territories. We serve individual investors and institutions, including financial advisors, hedge funds and introducing brokers. Our advanced technology, competitive pricing, and global market help our clients to make the most of their investments.Barron's has recognized Interactive Brokers as the #1 online broker for six consecutive years. Join our dynamic, multi-national team and be a part of a company that simplifies and enhances financial opportunities using state-of-the-art technology.</div>This is a hybrid role (3 days in the office/2 days remote).About the team:Interactive Brokers (IBKR) has been at the forefront of the Fintech space for over 40 years, and we pride ourselves on being a technology company. We continue to challenge the status quo and push boundaries to offer our clients the best trading platform with the most sophisticated features at the lowest cost. What will be your responsibilities within IBKR: <ul><li>Design and develop applications and services supporting IBKR's rapidly growing client base.</li><li>Build software that supports the expansion of IBKR brokerage business into new markets around the world.</li><li>Optimize and refactor existing code for improved reliability and performance.</li><li>Write and maintain design and engineering documentation.</li></ul> Which skills are required:<ul><li>Bachelor's or master's degree in Computer Science, or related degree.</li><li>Minimum 5 years of professional programming experience.</li><li>At least 3 years of Java programming experience.</li><li>Python, Perl or similar scripting language experience.</li><li>Relational databases experience (Oracle).</li><li>Strong analytical skills.</li><li>Good communication skills.</li></ul>What we'd also love to see:<ul><li>Prior experience in finance</li><li>An ambitious and diligent individual</li><li>An innovative mindset with a drive to improve upon existing systems</li><li>A desire to solve complex problems</li></ul> To be successful in this position, you will have the following:<ul><li>Self-motivated and able to handle tasks with minimal supervision.</li><li>Superb analytical and problem-solving skills.</li><li>Excellent collaboration and communication (Verbal and written) skills.</li><li>Outstanding organizational and time management skills.</li></ul>Company Benefits & Perks<div><ul><li>Competitive salary, annual performance-based bonus and stock grant</li><li>Retirement plan 401(k) with competitive company match</li><li>Excellent health and wellness benefits, including medical, dental, and vision benefits, and a company-paid medical healthcare premium.</li><li>Wellness screenings and assessments, health coaches and counseling services through an Employee Assistance Program (EAP)</li><li>Paid time off and a generous parental leave policy</li><li>Daily company lunch allowance provided, and a fully stocked kitchen with healthy options for breakfast and snacks</li><li>Corporate events, including team outings, dinners, volunteer activities and company sports teams</li><li>Education reimbursement and learning opportunities</li><li>Modern offices with multi-monitor setups</li></ul></div></div></div>

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

Interactive Brokers Interview Questions

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Interactive Brokers Interview Questions

Interactive Brokers Salaries by Position

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