Senior Java Software Engineer

E-Trading Platform Developer (Contract – London, Hybrid)

Day Rate - £550-£600 (Inside IR35)

An opportunity for an experienced Java Developer to work on high-performance e-trading systems within Front Office environments.

This role focuses on low-latency engineering, JVM optimisation, and real-time problem-solving in complex capital markets systems.

Responsibilities

• Design and build low-latency Java applications for trading and market connectivity.
• Conduct JVM tuning, Garbage Collector optimisation, and multithreading to achieve peak performance.
• Collaborate with quants, traders, and other engineers on real-time trading solutions.
• Implement and enhance event-driven architectures using frameworks such as LMAX Disruptor, Aeron, Gemfire, or Ignite.
• Engage in low-level performance analysis, including OS and network-level tuning.

Requirements

• 10+ years of Java development experience, ideally within Front Office or Capital Markets.
• Proven background in low-latency design and high-throughput systems.
• Deep understanding of JVM internals, concurrency models, and memory management.
• Knowledge of at least one asset class: FX, Rates, Credit, or Equities.
• Strong communication skills and the ability to discuss performance challenges at a granular technical level.
• Degree in Computer Science, Engineering, or a related field.

Desirable

• Experience with Coral Sequencer, GridGain, Hazelcast, or in-house messaging frameworks.
• Familiarity with Linux profiling tools and lock-free data structures.
• Prior exposure to real-time trading platforms or market data systems.

Details

• Contract role (competitive day rate)
• Hybrid working, typically 3 days in London office
• Focused, hands-on engineering environment working on mission-critical trading systems