Jobs at Citadel Securities

Build and maintain trading applications, risk tools, data platforms, dashboards, and workflow automation for APAC trading desks. Collaborate with traders and global engineering teams to deliver production-grade solutions, translate business needs into technical systems, and support applications during APAC market hours. The role involves data-intensive systems, operational workflows, production troubleshooting, and end-to-end feature ownership in a regulated trading environment.

Designs and operates cloud-native platform services, distributed systems, and large-scale compute, storage, and networking infrastructure supporting research, AI, and data-intensive workloads. Builds APIs, abstractions, automation, and deployment systems to simplify cloud resource management. Improves observability, performance, resiliency, and operational excellence while collaborating with researchers and engineers to deliver scalable production platforms.

Design, build, and operate high-performance Kdb+/Q platforms for real-time and historical market data, partnering with traders and researchers to deliver scalable time-series analytics, streaming, and trading solutions while driving architecture, automation, and operational excellence.

Software Engineers at Citadel develop, maintain, and support high-performance trading platforms, focusing on custom software solutions and system stability.

Design, develop, and deploy software solutions for automated trading systems while collaborating with researchers on technology priorities.

Quantitative Researchers at Citadel Securities develop automated trading strategies using statistical techniques and implement them in live environments.

The intern will develop trading strategies, back test models, analyze data, and collaborate with the research team to innovate and refine monetization systems.

Conduct ML/AI research to extract patterns from diverse datasets (including unstructured data), implement algorithms in high-quality code, back-test models, and document findings for quantitative trading applications.

PhD internship conducting research applying statistics, machine learning and AI (e.g., deep learning, NLP) to market data. Implement and test algorithms in production-quality code, work with large and unstructured datasets, back-test models, and document findings while collaborating with senior researchers.

As a Software Engineer Intern, you'll develop high-performance platforms and technological tools for trading strategies while collaborating with senior team members at Citadel Securities.

Conduct research, statistical analyses, and develop automated trading strategies using large data sets and sophisticated statistical techniques.

FPGA Engineers at Citadel Securities design and deploy FPGA solutions to enhance trading systems, maximizing efficiency and performance.

The Quantitative Research Analyst will develop and test trading strategies, implement models, and conduct statistical analysis in financial markets.

The Site Reliability Engineer will provide support and diagnose issues within a real-time, distributed environment, focusing on large-scale application and infrastructure management, with basic required skills in UNIX/Linux, networking, SQL, and scripting languages.