Senior Core Java Engineer - Low-Latency Trading

Senior Core Java Engineer - Low-Latency Trading

Salary: Up to £125,000 + bonus + benefits

Location: City of London (3 days onsite)

Build ultra-low latency systems at the heart of global FX trading!

This is an opportunity for a Senior Core Java Engineer to join a leading Asian FX trading firm as they continue to scale their London engineering team. You'll play a key role in designing and optimising high-performance trading systems where speed, precision and reliability are critical.

If you enjoy working close to the metal, solving complex performance challenges and operating in a fast-paced financial environment, this is the role for you.

What you'll be doing

• Design, build and optimise low-latency, high-throughput Core Java trading systems
• Own and drive performance improvements across critical components
• Contribute to the architecture and evolution of a world-class FX trading platform processing billions of messages per day
• Mentor engineers and promote best practices around testing, code quality and performance
• Operate within modern engineering practices including CI/CD, TDD, and Agile

Tech Environment

Core Java (no frameworks), multithreading, concurrency, low-latency optimisation, AWS/GCP, Docker, Kubernetes, CI/CD, TDD, Agile.

? What they're looking for

• Strong commercial experience in Core Java development (framework-light / no Spring environments preferred)
• Deep understanding of multithreading and concurrency
• Experience building or optimising low-latency or high-performance systems
• Background working in high-throughput, distributed environments
• Comfortable working in cloud-based infrastructure (AWS or GCP)
• Strong engineering fundamentals and a senior-level mindset (ownership, mentoring, architectural input)
• Interest in financial markets or trading systems (experience in finance is a plus, not essential)

? Why join?

Work on systems where milliseconds matter

High-impact role with real ownership and technical influence

Join a growing London team within a globally established trading firm

Competitive compensation with strong bonus potential

Interested? Apply now or get in touch for a confidential conversation.