Quantitative Developer

We are expanding our digital assets team and are seeking a Crypto Quantitative Developer to build and optimize high-performance trading systems in fast-moving, highly competitive markets. In this role, you’ll work at the intersection of quantitative research, low-latency systems, and crypto market microstructure, developing production-grade trading strategies using modern C++. Locations London, New York Responsibilities Design, develop, and maintain low‑latency, high‑performance C++ trading systems for crypto markets Partner closely with quantitative researchers and traders to translate trading ideas into production code Optimize system performance across latency, throughput, and reliability, including exchange connectivity and market data handling Build and enhance pricing, risk, and execution logic for crypto products Analyze and improve system behavior using large-scale market and trade data Ensure systems are resilient, well‑tested, and scalable across global crypto venues Qualifications Strong proficiency in C++ (C++17 or newer) with a focus on performance-critical systems Solid foundation in data structures, algorithms, and systems programming Experience developing production trading systems or other low‑latency, high‑availability software Strong understanding of Linux environments, networking, and concurrency with a focus on cloud deployments Excellent problem‑solving skills and the ability to work in a fast‑paced, collaborative environment Experience working with crypto markets, exchanges, or digital asset trading infrastructure (preferred) Knowledge of market microstructure, order books, and execution strategies (preferred) Background in quantitative finance, mathematics, computer science, or a related technical field Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel, please share your details and we will contact you if there is a vacancy available. Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world‑class liquidity, competitive pricing and seamless front‑to‑back execution in a broad array of financial products. Our teams of engineers, traders and researchers harness leading‑edge quantitative research and the accelerating power of compute, machine learning and AI to power our analytics and tackle the market’s and our clients’ most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com. #J-18808-Ljbffr