Senior Front Office Software Engineer

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 is seeking a Senior Low Latency Java Developer to join our Quantitative Strategies team within Pricing & Risk, working on our high-performance, high-frequency trading platform. This is a hands-on role at the core of our market-making technology stack, where nanoseconds matter and engineering excellence is critical. You'll design and build ultra-low latency pricing and risk systems that directly power our global trading operations. If you thrive in performance critical environments and want your work to have real market impact, we would love to hear from you., Ultra-Low Latency Engineering

• 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 techniques.

System Design & Ownership

• Take responsibility for designing scalable, resilient and maintainable systems.
• Contribute to architectural decisions across the trading and risk platform.
• Build tooling to improve monitoring, maintenance and performance diagnostics.

Trading-Focused Collaboration

• Work closely with Quants, Financial Engineering, Front Office and Business Operations.
• Support live trading systems, troubleshooting time-critical production issues.
• Contribute to the continuous evolution of our electronic trading infrastructure.

Mentorship & Technical Leadership

• Provide guidance and mentorship to junior developers.
• Champion engineering best practices, clean code principles and robust design patterns.
• Strong hands-on Java development experience within low latency financial systems.
• Deep understanding of performance optimisation, concurrency and JVM internals.
• Experience working on pricing, risk or electronic trading platforms.
• Knowledge of FIX protocol, order routing and broker connectivity highly beneficial.
• Strong mathematical and problem-solving mindset.
• Experience across asset classes such as FX, Equities, Commodities or Derivatives preferred.
• Ability to operate calmly in a fast-paced, Front Office trading environment.
• Experience mentoring engineers and influencing technical direction.