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Citadel Securities

Greater London / Global

Crypto Quantitative Developer

Job Description

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
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