Java Software Engineer

Job description

Java Software Engineer

A leading trading firm in London is growing its engineering team and is looking for a high-performance Java Engineer to help build ultra-low-latency systems used directly on live trading desks.

What You’ll Be Doing

• Designing and building low-latency Java systems used in electronic trading
• Developing highly concurrent, multithreaded applications
• Optimising performance at the microsecond level
• Working closely with traders, quants, and infrastructure teams
• Improving throughput, stability, and execution speed
• Writing clean, well-tested production code

What We’re Looking For

• Strong commercial experience with Core Java
• Deep knowledge of multithreading, concurrency, and JVM internals
• Proven experience building low-latency / high-throughput systems
• Strong understanding of networking, memory management, and performance tuning
• Experience in trading, market data, risk, or execution systems preferred

Nice to Have

• Experience with FIX, market data feeds, or pricing engines
• Knowledge of Linux internals
• Background in finance, trading, or HFT environments

What’s On Offer

• £130k base
• Discretionary bonus
• 3 days a week in the office, 2 days a week WFH

Extra information

Status

Open

Education Level

Secondary School

Location

London Area

Type of Contract

Full-time jobs

Published at

20-01-2026

Profession type

Accountancy

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English