Senior Low-Latency Java Engineer - Trading Systems

CMC MARKETS PLC; City of Westminster; On-site; GBP 100,000 - 150,000; Full time

Job summary

CMC Markets PLC is seeking a Senior Low Latency Java Developer to join our Quantitative Strategies team within Pricing & Risk, working on ultra-fast, high-performance trading systems. You will design and build low-latency pricing and risk components powering our global operations.

The role requires hands-on Java development, strong concurrency skills, and a deep understanding of JVM internals to optimise performance in a market-making environment.

Qualifications

• Expertise in building low-latency Java systems for pricing and risk.
• Strong knowledge of concurrency and memory management.
• Deep understanding of JVM internals and performance tuning.

Responsibilities

• Develop and optimise high-performance Java (21+) systems for pricing, risk and trading.
• Build and enhance components within a low latency, high-throughput trading architecture.
• Apply advanced concurrency, memory management and performance tuning.
• Design scalable, resilient and maintainable systems.
• Contribute to architectural decisions across trading and risk platform.
• Build tooling to improve monitoring, maintenance and diagnostics.
• Work with Quants, Financial Engineering, Front Office and Ops.
• Support live trading systems and troubleshoot time-critical issues.
• Contribute to evolution of electronic trading infrastructure.
• Provide guidance and mentorship to junior developers.
• Champion best practices, clean code and robust design patterns.
• Hands-on Java experience in low-latency financial systems.
• Knowledge of FIX protocol, order routing and broker connectivity.
• Experience across FX, Equities, Commodities or Derivatives.
• Operate calmly in a fast-paced Front Office trading environment.
• Mentor engineers and influence technical direction.

Job description

CMC Markets PLC is seeking a Senior Low Latency Java Developer to join our Quantitative Strategies team within Pricing & Risk, working on ultra-fast, high-performance trading systems. You will design and build low-latency pricing and risk components powering our global operations.

The role requires hands-on Java development, strong concurrency skills, and a deep understanding of JVM internals to optimise performance in a market-making environment.