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# Senior Quantitative Developer

- **Company:** Group Llc
- **Location:** Chicago, IL, United States
- **Experience:** Expert
- **Salary:** $120,000.0 - $145,000.0
- **Contract:** Permanent contract
- **Skills:** C Sharp (Programming Language), C++ (Programming Language), Code Review, Monitoring of Systems, Software Engineering, Systems Architecture, Information Technology, Real Time Data
- **Published:** September 27, 2026
- **Apply:** https://www.careerjet.com/jobad/usef89c0e79d3dce8e9218e51676c49544

## About the Role

Developer possesses the following:Strong quantitative and analytical skills, including familiarity with probability, statistics, numerical methods, and the evaluation of model or strategy behaviorKnowledge of options pricing models, implied volatility surfaces, risk measurements, and market microstructureDemonstrated ability to work directly with traders and quantitative researchersSubstantial professional software development experience throughout the full software development lifecycle, including requirements analysis, architecture, implementation, testing, deployment, monitoring, and production supportAbility to lead technical design discussions, make pragmatic architectural decisions, mentor other developers, and improve engineering standards across the teamStrong written and verbal communication skills, including the ability to explain complex technical and quantitative conceptsA bachelor's degree in computer science, engineering, mathematics, statistics, or related quantitative
fields, or equivalent practical experienceAre you equally comfortable discussing a strategy with a trader, analyzing unexpected model behavior, and diagnosing a production performance issue? Do you take ownership of systems after they are deployed? Can you raise the technical standard of a team while continuing to write and deliver high-quality code? If yes, you may be a strong fit for this Senior Quantitative Developer position.WHAT TO EXPECT AS A SENIOR QUANTITATIVE DEVELOPERWithin 1 month, you will complete your initial orientation and begin developing a working understanding of our options market-making business, trading strategies, quantitative research process, and production technology environment. You will become familiar with our codebases, historical and real-time data, system architecture, deployment processes, monitoring tools, and risk controls. You will build working relationships with traders, quantitative researchers, developers, and infrastructure engineers, begin
participating in technical design and code reviews, and make initial contributions to the production system.Within 3 months, you will take end-to-end ownership of a meaningful strategy, research, pricing, risk, or trading-system enhancement. You will work directly with developers and quantitative researchers to refine the problem, identify appropriate success criteria, and implement the solution. You will validate your work in non-production testing environments. You will coordinate deployment of your changes with appropriate monitoring and controls, participate effectively in production support, and begin identifying opportunities to improve system performance and maintainability. You will study for and pass the FINRA Series 57 exam, enabling you to independently lead projects that directly impact trading decisions.Within 6 months, you will be a trusted technical owner for one or more important components of the trading platform. You will independently lead complex projects

## Description

Senior Quantitative DeveloperLocation: Chicago, IL or New York, NYBase Salary Range: $200,000 - $275,000(Base salary is only one part of Group One Trading's total compensation, which includes an annual discretionary bonus.)THE OPPORTUNITYOur Senior Quantitative Developers work directly with traders and quantitative researchers to build and improve the pricing, strategy, risk, and execution systems that power our options market-making business. They combine academic ideas with a pragmatic understanding of trader approach and intuition, to deliver critical systems from initial design through deployment and shape the strategic direction of the firm.THE SKILLSETOur production environment is primarily heavily-optimized C#, with C++ integrated into especially performance-sensitive components. We value demonstrated engineering ability over experience with a particular language, and we embrace agentic AI workflows as a valuable asset to our engineering approach.Our ideal Senior Quantitative, Senior Quantitative Developer Location: Chicago, IL or New York, NY Base Salary Range: $200,000 - $275,000 (Base salary is only one part of Group One Trading's total compensa…

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