Python Developer — United States — LinkedIn — 4488806412

Citadel is a global investment firm that combines quantitative insight, research, and technology to support investment decision-making. The firm’s teams bring together investment professionals, quantitative researchers, and engineers to explore complex questions across financial markets. Technology plays a central role in turning research ideas into practical tools and systems, helping investment teams work with data, evaluate strategies, and make informed decisions.

About The Role

Citadel is seeking a Quantitative Developer to build and advance the software, platforms, and infrastructure that support investment research and decision-making. In this role, you will work closely with quantitative researchers, portfolio managers, traders, and fellow engineers. You will help transform analytical ideas and quantitative models into reliable, maintainable software, while developing systems that can process large and complex datasets.

The position offers the opportunity to contribute throughout the development process, from understanding a research workflow and prototyping a solution to creating production-ready applications. You will solve technically challenging problems in a fast-moving environment where technology has a direct connection to investment work. Success requires strong engineering fundamentals, sound judgment, curiosity, and the ability to collaborate with colleagues across technical and investment disciplines.

Qualifications

• Bachelor’s degree or higher in Computer Science, Engineering, Mathematics, Statistics, Physics, or a related STEM discipline, or equivalent practical experience.

• Exceptional Python programming skills and a strong foundation in computer science, including data structures, algorithms, and software design.

• Experience working with large or complex datasets and developing data-intensive applications.

• Ability to design and deliver reliable, maintainable software that supports analytical or research workflows.

• Clear written and verbal communication skills, including the ability to explain technical concepts and results to stakeholders with varying backgrounds.

• An ownership mindset, entrepreneurial approach, and adaptability when requirements, priorities, or technologies change.

• Ability to manage multiple priorities in a demanding, dynamic environment.

• Intellectual curiosity and an interest in learning about financial markets and investment research.

Responsibilities

• Partner with quantitative researchers, portfolio managers, traders, and engineers to understand investment objectives, research questions, and working processes.

• Translate quantitative models and research ideas into dependable, maintainable production software.

• Build, operate, and improve high-performance data pipelines and analytical infrastructure for large and complex datasets.

• Develop custom tools and prototypes that enable investment teams to test hypotheses, explore data, and gain insights efficiently.

• Contribute to technical decisions that support scalable, effective research and trading systems.

• Identify challenges in existing workflows and develop practical software solutions in collaboration with relevant teams.

• Learn from experienced engineers, quantitative researchers, and investment professionals while continuing to strengthen your technical and financial-market knowledge.

Benefits

The base salary range for this role is $200,000 to $300,000, in accordance with applicable law. The employee who fills this role will also be eligible to participate in a discretionary incentive compensation program. Benefits may include medical and life insurance, retirement and tax-free savings plans, and access to other healthcare programs. Compensation and benefits are subject to applicable plan terms and eligibility requirements.

Equal Opportunity

Citadel is committed to considering qualified candidates fairly and in accordance with applicable equal opportunity and employment laws. Opportunities may become available in locations where the business operates. Candidates applying for positions in the United Kingdom must have, or be able to obtain, authorization to work in the UK.