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Trading Technologies Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

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Let’s say you work for a social media company that has just done a launch in a new city. Looking at weekly metrics, you see a slow decrease in the average number of comments per user from January to March in this city.

The company has been consistently growing new users in the city from January to March.

What are some reasons why the average number of comments per user would be decreasing and what metrics would you look into?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

Decreasing Comments

How would you investigate a decline in the average number of comments per user?

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?

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

What Will You Be Involved With?
Design, develop and implement web applications. This will include implementing new product features and GUI’s, as well as enhancing and maintaining existing functionality, monitoring solutions and performance characteristics
Participation in design discussions, review sessions and prototyping
Successfully integrate data between various systems
Ensure the scalability and quality of all code
Assist with product documentation, unit testing and ensuring overall product quality
What Will You Bring to the Table?
Familiarity with server development and Amazon Web Services (AWS) cloud technologies
Strong object-oriented code design understanding of SOLID design patterns
Familiarity with agile / iterative development methodologies
Solid debugging and performance-tuning skills
Experience with modern web frameworks like React.
Knowledge of modern JS tools and frameworks
Solid understanding of functional programming, object-oriented programming, and CS foundations
Experience building scalable, optimal-performance web applications
Proven and strong communication skills
Ability to understand business requirements and translate them to technical requirements
AWS and Python experience a plus
Bachelor’s Degree in Computer Science, Engineering, or related discipline. Advanced degree preferred. Will consider equivalent experience.
Strong analytical skills to assist in debugging complex issues.
What We Bring to the Table
Competitive benefits, including medical, dental, vision, FSA, HSA, 401(k) and pre-tax transit / parking
Flexible work schedules – with some remote work
22 PTO (paid time off) days per year with the ability to roll over days into the following year, one day per year available for volunteering, 2 Training days per year to allow uninterrupted professional development, 1 additional PTO day added during a milestone year, robust paid holiday schedule with early dismissal, generous parental leave (for all genders and staff, including adoptive parents), and backup child and pet care as well as tutoring services
The company provided top-of-the-line tech resources and a tech accessories budget for monitors, headphones, keyboards, office equipment.
Milestone anniversary bonuses
Stipend and subsidy contributions toward personally-owned cell phones and laptops, gym memberships, and health / wellness initiatives (including discounted healthcare premiums and healthy meal delivery programs)
Trading Technologies is a Software-as-a-Service (SaaS) technology platform provider to the global capital markets industry. The company’s award-winning TT platform connects to the world’s major international exchanges and liquidity venues in listed derivatives alongside a growing number of asset classes, including fixed income and cryptocurrencies. The TT platform delivers advanced tools for trade execution and order management, market data solutions, analytics, trade surveillance, risk management, and infrastructure services to the world’s leading sell-side institutions, buy-side firms, and exchanges. The company’s blue-chip client base includes Tier 1 banks as well as brokers, money managers, hedge funds, proprietary traders, Commodity Trading Advisors (CTAs), commercial hedgers, and risk managers. These firms rely on the TT ecosystem to manage their end-to-end trading operations. In addition, exchanges utilize TT’s technology to deliver innovative solutions to their market participants. TT also strategically partners with technology companies to make their complementary offerings available to Trading Technologies’ global client base through the TT ecosystem.
Trading Technologies (TT) is an equal-opportunity employer. Equal employment has been, and continues to be, a required practice at the Company. Trading Technologies’ practice of equal employment opportunity is to recruit, hire, train, promote, and base all employment decisions on ability rather than race, color, religion, national origin, sex / gender orientation, age, disability, sexual orientation, genetic information or any other protected status. Additionally, TT participates in the E-Verify Program for US offices.
Trading Technologies is a Software-as-a-Service (SaaS) technology platform provider to the global capital markets industry. The company’s award-winning TT platform connects to the world’s major international exchanges and liquidity venues in listed derivatives alongside a growing number of asset classes, including fixed income and cryptocurrencies. The TT platform delivers advanced tools for trade execution and order management, market data solutions, analytics, trade surveillance, risk management, and infrastructure services to the world’s leading sell-side institutions, buy-side firms, and exchanges. The company’s blue-chip client base includes Tier 1 banks as well as brokers, money managers, hedge funds, proprietary traders, Commodity Trading Advisors (CTAs), commercial hedgers, and risk managers. These firms rely on the TT ecosystem to manage their end-to-end trading operations. In addition, exchanges utilize TT’s technology to deliver innovative solutions to their market participants. TT also strategically partners with technology companies to make their complementary offerings available to Trading Technologies’ global client base through the TT ecosystem.

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Software Engineer (C++) - Risk Services Team  Join to apply for the  Software Engineer (C++) - Risk Services Team  role at  Trading Technologies
Software Engineer (C++) - Risk Services Team  Join to apply for the  Software Engineer (C++) - Risk Services Team  role at  Trading Technologies
Compensation:  $100,000 - $150,000 / year

Application Deadline:  30 April 2026
Department:  Engineering
Location:  Chicago
Compensation:  $100,000 - $150,000 / year

Description

We are currently seeking a driven and talented Software Engineer to join our Risk Services team. Our Software Engineers thrive on pushing the limits of technology to produce state-of-the-art applications for TT’s platform, which is the front-end screen of choice for professional derivatives traders around the world. As a Software Engineer you will work on our award-winning trading platform which incorporates robust, high-performance tools for spread trading, strategy creation, algorithmic and automated trading, black-box execution, high-frequency proximity-based trading and more.

What Will You Be Involved With?

Code day to day in C++ and other programming languages
Design and implement software requirements and new product features
Enhance and maintain existing functionality
Participate in design discussions and review sessions
Create high-level and detailed design documents
Assist with product documentation, unit testing and ensuring overall product quality
Support, maintain, and enhance existing and new product functionality for trading software in a real-time, multi-threaded, multi-tier server architecture environment to create high and low level design for concurrent high throughput, low latency software architecture
Provide software development plans that meet future needs of clients and markets
Evolve the new software platform and architecture by introducing new components and integrating them with existing ones
Perform memory and resource management analysis
Analyze stack traces, core dumps and production incident reports from traders and support teams
Propose fixes, enhancements to existing trading systems
Adhere to release and sprint planning with the Quality Assurance Group and Project Management
Attend and participate in daily scrum meetings
Design, develop, program server-side software components

What Will You Bring to the Table?

A minimum 3 years of solid modern C++ development experience and the ability to understand, write, review and debug multithreaded code is required
Proven experience in multi-threaded applications with a focus on performance is required
Experience with Linux operating systems is required
Experience with financial trading systems experience is a plus but not required
Strong object-oriented design and programming skills
Ability to understand business requirements and translate them into technical requirements and working application code
Familiarity with agile/iterative development methodologies
Solid debugging and performance tuning skills
Knowledge of relational database technology, and non relational databases (Cassandra, MongoDB etc) is desirable.
Additional Desired Skills:
Scala proficiency:  Demonstrated experience leveraging Scala for complex data processing and application development.
Kafka expertise:  Proven ability to design, implement, and optimize solutions using Kafka clusters.

What We Bring to the Table

Competitive benefits, including medical, dental, vision, FSA, HSA, 401(k) and pre-tax transit/parking
Flexible work schedules – with some remote work
22 PTO (paid time off) days per year with the ability to roll over days into the following year, one day per year available for volunteering, 2 Training days per year to allow uninterrupted professional development, 1 additional PTO day added during a milestone year, robust paid holiday schedule with early dismissal, generous parental leave (for all genders and staff, including adoptive parents), and backup child and pet care as well as tutoring services
The company provided top-of-the-line tech resources and a tech accessories budget for monitors, headphones, keyboards, office equipment.
Milestone anniversary bonuses
Stipend and subsidy contributions toward personally-owned cell phones and laptops, gym memberships, and health/wellness initiatives (including discounted healthcare premiums and healthy meal delivery programs)

Trading Technologies is a Software-as-a-Service (SaaS) technology platform provider to the global capital markets industry. The company’s award-winning TT platform connects to the world’s major international exchanges and liquidity venues in listed derivatives alongside a growing number of asset classes, including fixed income and cryptocurrencies. The TT platform delivers advanced tools for trade execution and order management, market data solutions, analytics, trade surveillance, risk management, and infrastructure services to the world’s leading sell-side institutions, buy-side firms, and exchanges. The company’s blue-chip client base includes Tier 1 banks as well as brokers, money managers, hedge funds, proprietary traders, Commodity Trading Advisors (CTAs), commercial hedgers, and risk managers. These firms rely on the TT ecosystem to manage their end-to-end trading operations. In addition, exchanges utilize TT’s technology to deliver innovative solutions to their market participants. TT also strategically partners with technology companies to make their complementary offerings available to Trading Technologies’ global client base through the TT ecosystem.

Trading Technologies (TT) is an equal-opportunity employer. Equal employment has been, and continues to be, a required practice at the Company. Trading Technologies’ practice of equal employment opportunity is to recruit, hire, train, promote, and base all employment decisions on ability rather than race, color, religion, national origin, sex/gender orientation, age, disability, sexual orientation, genetic information or any other protected status. Additionally, TT participates in the E-Verify Program for US offices.

Seniority level    Seniority level Mid-Senior level
Employment type    Employment type Full-time
Job function    Job function Engineering and Information Technology
Industries Software Development
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Software Engineer Internship - Javascript or SDET Application Deadline: 30 May 2025 Department: Engineering Employment Type: Full Time Location: Chicago Compensation: $31.00 - $35.00 / hour Description We are currently seeking driven and talented Summer Interns who thrive on pushing the limits of technology, creativity, and innovation. Over the course of the 10-week paid internship (June - August 2025), you will gain hands-on, real-world experience working alongside industry leaders to develop your understanding of the financial markets and cutting-edge technology. Additionally, our Summer Internship program includes lunch-and-learns with executive leaders, outings and collaborative team building, and trading competitions. What Will You Be Involved With? <ul> <li>Engineering: Design and implement software requirements for our trading platforms; enhance and maintain existing functionality; work in C++, C, C#, Java, JavaScript, Python, and/or other technologies </li></ul>What Will You Bring to the Table? <ul> <li>Currently pursuing an undergraduate or graduate degree in Computer Science, Engineering, Finance, Business, or a related field </li><li>Previous internship experience ideal, but not required </li><li>Excellent technical, analytical, and math skills </li><li>Strong communication and interpersonal skills </li><li>Ability to work in a collaborative, team environment </li><li>Passionate to pursue a career in your field of study </li></ul> What We Bring to the Table Trading Technologies is a Software-as-a-Service (SaaS) technology platform provider to the global capital markets industry. The company's award-winning TT® platform connects to the world's major international exchanges and liquidity venues in listed derivatives alongside a growing number of asset classes, including fixed income and cryptocurrencies. The TT platform delivers advanced tools for trade execution and order management, market data solutions, analytics, trade surveillance, risk management, and infrastructure services to the world's leading sell-side institutions, buy-side firms, and exchanges. The company's blue-chip client base includes Tier 1 banks as well as brokers, money managers, hedge funds, proprietary traders, Commodity Trading Advisors (CTAs), commercial hedgers, and risk managers. These firms rely on the TT ecosystem to manage their end-to-end trading operations. In addition, exchanges utilize TT's technology to deliver innovative solutions to their market participants. TT also strategically partners with technology companies to make their complementary offerings available to Trading Technologies' global client base through the TT ecosystem. Trading Technologies (TT) is an equal-opportunity employer. Equal employment has been, and continues to be, a required practice at the Company. Trading Technologies' practice of equal employment opportunity is to recruit, hire, train, promote, and base all employment decisions on ability rather than race, color, religion, national origin, sex/gender orientation, age, disability, sexual orientation, genetic information or any other protected status. Additionally, TT participates in the E-Verify Program for US offices.

Software Engineer (C++) - Risk Services Team Application Deadline: 30 April 2026 Department: Engineering Employment Type: Full Time Location: Chicago Compensation: $100,000 - $150,000 / year Description We are currently seeking a driven and talented Software Engineer to join our Risk Services team. Our Software Engineers thrive on pushing the limits of technology to produce state-of-the-art applications for TT's platform, which is the front-end screen of choice for professional derivatives traders around the world. As a Software Engineer you will work on our award-winning trading platform which incorporates robust, high-performance tools for spread trading, strategy creation, algorithmic and automated trading, black-box execution, high-frequency proximity-based trading and more. What Will You Be Involved With? <ul> <li>Code day to day in C++ and other programming languages </li><li>Design and implement software requirements and new product features </li><li>Enhance and maintain existing functionality </li><li>Participate in design discussions and review sessions </li><li>Create high-level and detailed design documents </li><li>Assist with product documentation, unit testing and ensuring overall product quality </li><li>Support, maintain, and enhance existing and new product functionality for trading software in a real-time, multi-threaded, multi-tier server architecture environment to create high and low level design for concurrent high throughput, low latency software architecture </li><li>Provide software development plans that meet future needs of clients and markets </li><li>Evolve the new software platform and architecture by introducing new components and integrating them with existing ones </li><li>Perform memory and resource management analysis </li><li>Analyze stack traces, core dumps and production incident reports from traders and support teams </li><li>Propose fixes, enhancements to existing trading systems </li><li>Adhere to release and sprint planning with the Quality Assurance Group and Project Management </li><li>Attend and participate in daily scrum meetings </li><li>Design, develop, program server-side software components </li></ul>What Will You Bring to the Table? <ul> <li>A minimum 3 years of solid modern C++ development experience and the ability to understand, write, review and debug multithreaded code is required </li> <li>Proven experience in multi-threaded applications with a focus on performance is required </li><li>Experience with Linux operating systems is required </li><li>Experience with financial trading systems experience is a plus but not required </li><li>Strong object-oriented design and programming skills </li><li>Ability to understand business requirements and translate them into technical requirements and working application code </li><li>Familiarity with agile/iterative development methodologies </li><li>Solid debugging and performance tuning skills </li><li>Knowledge of relational database technology, and non relational databases (Cassandra, MongoDB etc) is desirable. </li></ul>Additional Desired Skills: <ul> <li>Scala proficiency: Demonstrated experience leveraging Scala for complex data processing and application development. </li></ul>Kafka expertise: Proven ability to design, implement, and optimize solutions using Kafka clusters. What We Bring to the Table <ul> <li>Competitive benefits, including medical, dental, vision, FSA, HSA, 401(k) and pre-tax transit/parking </li><li>Flexible work schedules - with some remote work </li><li>22 PTO (paid time off) days per year with the ability to roll over days into the following year, one day per year available for volunteering, 2 Training days per year to allow uninterrupted professional development, 1 additional PTO day added during a milestone year, robust paid holiday schedule with early dismissal, generous parental leave (for all genders and staff, including adoptive parents), and backup child and pet care as well as tutoring services </li><li>The company provided top-of-the-line tech resources and a tech accessories budget for monitors, headphones, keyboards, office equipment. </li><li>Milestone anniversary bonuses </li><li> Stipend and subsidy contributions toward personally-owned cell phones and laptops, gym memberships, and health/wellness initiatives (including discounted healthcare premiums and healthy meal delivery programs) </li> </ul> Trading Technologies is a Software-as-a-Service (SaaS) technology platform provider to the global capital markets industry. The company's award-winning TT® platform connects to the world's major international exchanges and liquidity venues in listed derivatives alongside a growing number of asset classes, including fixed income and cryptocurrencies. The TT platform delivers advanced tools for trade execution and order management, market data solutions, analytics, trade surveillance, risk management, and infrastructure services to the world's leading sell-side institutions, buy-side firms, and exchanges. The company's blue-chip client base includes Tier 1 banks as well as brokers, money managers, hedge funds, proprietary traders, Commodity Trading Advisors (CTAs), commercial hedgers, and risk managers. These firms rely on the TT ecosystem to manage their end-to-end trading operations. In addition, exchanges utilize TT's technology to deliver innovative solutions to their market participants. TT also strategically partners with technology companies to make their complementary offerings available to Trading Technologies' global client base through the TT ecosystem. Trading Technologies (TT) is an equal-opportunity employer. Equal employment has been, and continues to be, a required practice at the Company. Trading Technologies' practice of equal employment opportunity is to recruit, hire, train, promote, and base all employment decisions on ability rather than race, color, religion, national origin, sex/gender orientation, age, disability, sexual orientation, genetic information or any other protected status. Additionally, TT participates in the E-Verify Program for US offices.

Senior Software Engineer Application Deadline: 30 January 2026 Department: Engineering Employment Type: Full Time Location: New York Compensation: $200,000 - $250,000 / year Description We are seeking a full-stack Javascript Developer for our NY Team who thrives on pushing the limits of technology to produce state-of-the-art solutions. Our engineering team is constantly challenged to deliver creative, imaginative, and scalable execution solutions to highly complex trading customers. We've worked hard to make our platform the top choice for derivatives traders and are committed to pushing the envelope. If this sounds like a place you can thrive, please continue reading. Experience working with Buyside Fixed Income products strongly preferred. What Will You Be Involved With? <ul><li>Design, develop and implement web applications. This will include implementing new product features and GUI's, as well as enhancing and maintaining existing functionality, monitoring solutions and performance characteristics</li><li>Participation in design discussions, review sessions and prototyping</li><li>Successfully integrate data between various systems</li><li>Ensure the scalability and quality of all code</li><li>Assist with product documentation, unit testing and ensuring overall product quality</li></ul> What Will You Bring to the Table? <ul><li>Proficiency in JavaScript, with a minimum of five years of direct experience in team-based development </li><li>Experience with multi-threaded browser </li><li>Familiarity with server development and Amazon Web Services (AWS) cloud technologies</li><li>Strong object-oriented code design understanding of SOLID design patterns</li><li>Familiarity with agile/iterative development methodologies</li><li>Experience developing on large-scale systems</li><li>Solid debugging and performance-tuning skills</li><li>Experience with modern web frameworks like React.</li><li>Knowledge of modern JS tools and frameworks</li><li>Solid understanding of functional programming, object-oriented programming, and CS foundations</li><li>Experience building scalable, optimal-performance web applications</li><li>Good understanding of both front-end (Javascript, HTML, CSS) and server-side (Node.js or Python) components</li><li>Proven and strong communication skills</li><li>Ability to understand business requirements and translate them to technical requirements</li><li>AWS and Python experience a plus</li><li>Bachelor's Degree in Computer Science, Engineering, or related discipline. Advanced degree preferred. Will consider equivalent experience. </li><li>Financial trading systems experience.</li><li>Strong analytical skills to assist in debugging complex issues.</li></ul> What We Bring to the Table <ul><li>Competitive benefits, including medical, dental, vision, FSA, HSA, 401(k) and pre-tax transit/parking</li><li>Flexible work schedules - with some remote work</li><li>22 PTO (paid time off) days per year with the ability to roll over days into the following year, one day per year available for volunteering, 2 Training days per year to allow uninterrupted professional development, 1 additional PTO day added during a milestone year, robust paid holiday schedule with early dismissal, generous parental leave (for all genders and staff, including adoptive parents), and backup child and pet care as well as tutoring services</li><li>The company provided top-of-the-line tech resources and a tech accessories budget for monitors, headphones, keyboards, office equipment.</li><li>Milestone anniversary bonuses</li><li> Stipend and subsidy contributions toward personally-owned cell phones and laptops, gym memberships, and health/wellness initiatives (including discounted healthcare premiums and healthy meal delivery programs) </li></ul> Trading Technologies is a Software-as-a-Service (SaaS) technology platform provider to the global capital markets industry. The company's award-winning TT® platform connects to the world's major international exchanges and liquidity venues in listed derivatives alongside a growing number of asset classes, including fixed income and cryptocurrencies. The TT platform delivers advanced tools for trade execution and order management, market data solutions, analytics, trade surveillance, risk management, and infrastructure services to the world's leading sell-side institutions, buy-side firms, and exchanges. The company's blue-chip client base includes Tier 1 banks as well as brokers, money managers, hedge funds, proprietary traders, Commodity Trading Advisors (CTAs), commercial hedgers, and risk managers. These firms rely on the TT ecosystem to manage their end-to-end trading operations. In addition, exchanges utilize TT's technology to deliver innovative solutions to their market participants. TT also strategically partners with technology companies to make their complementary offerings available to Trading Technologies' global client base through the TT ecosystem. Trading Technologies (TT) is an equal-opportunity employer. Equal employment has been, and continues to be, a required practice at the Company. Trading Technologies' practice of equal employment opportunity is to recruit, hire, train, promote, and base all employment decisions on ability rather than race, color, religion, national origin, sex/gender orientation, age, disability, sexual orientation, genetic information or any other protected status. Additionally, TT participates in the E-Verify Program for US offices.

Trading Technologies Interview Questions

Trading Technologies Interview Guides

Trading Technologies Interview Questions

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