Location: London, UK (Hybrid - 3 days onsite) Contract: Initial 12-month contract Rate: Up to £800/day (Inside IR35) We are seeking a Senior Quantitative Developer to join a high-performing electronic FX (eFX) technology team within a leading global investment bank. This role focuses on the design, development, and optimisation of low-latency trading systems that support automated pricing, execution, and quantitative trading strategies. Key Responsibilities

Design and build low-latency, event-driven trading systems for FX markets
Collaborate with quantitative analysts to integrate and optimise trading models
Develop and enhance capabilities across pricing, execution, and back-testing frameworks
Conduct latency and performance analysis, driving continuous optimisation
Build analytics and monitoring tools to assess system and model performance
Contribute to the scalability, resilience, and reliability of the core trading platform
Work in an agile delivery environment with frequent releases to production
Strong experience in electronic trading systems, ideally within FX
Proven track record building low-latency, high-throughput applications
Advanced Java development skills, including performance optimisation (low GC, lock-free techniques)
Experience with Real Time messaging frameworks/protocols (eg Aeron, Kafka, FIX, ITCH, OUCH)
Familiarity with time-series data platforms, preferably KDB
Solid understanding of modern software engineering practices (CI/CD, testing, agile)
Ability to work closely with cross-functional teams and contribute to technical documentation

Strong experience in electronic trading systems, ideally within FX
Proven track record building low-latency, high-throughput applications
Advanced Java development skills, including performance optimisation (low GC, lock-free techniques)
Experience with Real Time messaging frameworks/protocols (eg Aeron, Kafka, FIX, ITCH, OUCH)
Familiarity with time-series data platforms, preferably KDB
Solid understanding of modern software engineering practices (CI/CD, testing, agile)
Ability to work closely with cross-functional teams and contribute to technical documentation

1 contract Tech / Digital / IT jobs in Harlow