Python Developer — United States — LinkedIn — 4489384775

About The Company

Citadel is a global investment firm that brings together technology, data, and quantitative research to support investment decision-making. Its teams work across disciplines to examine complex markets, develop evidence-based perspectives, and apply advanced analytical methods. At Citadel, software engineering is an essential part of turning research into practical, reliable systems that can operate at scale. The firm’s technology and investment professionals collaborate to build tools and infrastructure that help teams explore data, evaluate ideas, and respond to changing market conditions.

About The Role

Citadel is hiring Quantitative Developers in the United States to combine strong software engineering with quantitative analysis. In this role, you will work closely with quantitative researchers, portfolio managers, traders, and other technology professionals to transform analytical models and research concepts into production-quality software. You will help design scalable systems, develop data pipelines, and create tools that make it easier to test hypotheses and extract insights from large, complex datasets.

This position is suited to an engineer who enjoys solving challenging problems where software performance, data quality, and analytical rigor all matter. You will contribute throughout the development lifecycle, from understanding a research need and evaluating possible approaches to implementation, testing, deployment, and ongoing improvement. You will also help ensure that the systems supporting research and decision-making are maintainable, dependable, and responsive to the needs of their users.

Qualifications

Successful candidates will bring a strong foundation in software development and an interest in applying technology to quantitative problems. You should be comfortable working with complex data and translating ambiguous requirements into clear, well-structured technical solutions. The ability to communicate effectively with both engineering colleagues and investment professionals is important, as is a collaborative approach to solving problems.

Relevant qualifications include experience designing, building, testing, and maintaining production software; proficiency in one or more programming languages used for data-intensive or analytical applications; and familiarity with data structures, algorithms, and sound software engineering practices. Experience with databases, distributed systems, data processing, or performance optimization may be valuable. Candidates should demonstrate curiosity, attention to detail, sound judgment, and a willingness to learn new tools and methods. A background in computer science, engineering, mathematics, statistics, or a related discipline can provide a useful foundation.

Responsibilities

Design, develop, test, and maintain production systems that support quantitative research and investment decision-making. Partner with researchers, portfolio managers, and traders to understand their workflows and convert research models, analytical methods, and user needs into scalable software. Build and improve data pipelines that support the reliable processing, organization, and analysis of large datasets. Develop tools that enable teams to investigate data, evaluate ideas, run experiments, and communicate findings efficiently.

Contribute to technical design discussions and select appropriate approaches with consideration for reliability, performance, maintainability, and usability. Identify and resolve software or data issues, improve existing systems, and document important design choices. Work across teams to integrate components and ensure solutions meet operational requirements. Keep current with relevant technologies and share knowledge that can improve engineering practices and collaboration.

Benefits

Citadel offers the opportunity to work on technically challenging problems alongside experienced professionals in engineering, quantitative research, and investing. Team members can contribute to systems and tools with a direct connection to research workflows and decision-making. The role also provides opportunities to broaden technical expertise, collaborate across disciplines, and grow through meaningful project work. Specific compensation, benefits, and workplace arrangements may vary by position and location and will be discussed during the hiring process.

Equal Opportunity

Citadel is committed to providing equal employment opportunities. Employment decisions are made in accordance with applicable laws and without discrimination on the basis of protected characteristics. The firm values a respectful, professional workplace where individuals can contribute their skills and perspectives.