Senior Front‑Office Java Engineer – Ultra‑Low Latency

CMC Markets; Greater London; On-site; GBP 120,000 - 180,000; Full time

Job summary

CMC Markets is seeking a Senior Low Latency Java Developer for the Quantitative Strategies team in London. You will design and build ultra‑low latency pricing and risk systems that power our market‑making stack, collaborating with Quants, Front Office and Business Operations.

This onsite role requires 5 days on site at our London office near Liverpool Street. You will lead performance tuning, concurrency optimization and JVM internals work, while mentoring engineers and contributing to

Qualifications

• 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 is beneficial.
• Strong mathematical and problem-solving mindset.
• Experience across FX, Equities, Commodities or Derivatives is preferred.
• Ability to operate calmly in a fast-paced front-office trading environment.
• Experience mentoring engineers and influencing technical direction.
• Minimum 2:1 degree in a numerate discipline.

Responsibilities

• Develop ultra-low latency Java systems for pricing, risk and trading.
• Design scalable, resilient and maintainable systems for a high-performance stack.
• Collaborate with Quants, Front Office and Business Operations on live trading.
• Provide mentorship and drive engineering best practices.

Skills

Java development (low latency)

Performance optimisation

Concurrency

JVM internals

Pricing/Trading platforms

FIX protocol

Problem solving

Mentoring engineers

Front-office trading environment

Education

2:1 degree in Computer Science/Mathematics/Physics or numerate discipline

Job description

CMC Markets is seeking a Senior Low Latency Java Developer for the Quantitative Strategies team in London. You will design and build ultra‑low latency pricing and risk systems that power our market‑making stack, collaborating with Quants, Front Office and Business Operations.

This onsite role requires 5 days on site at our London office near Liverpool Street. You will lead performance tuning, concurrency optimization and JVM internals work, while mentoring engineers and contributing to