Senior Low Latency Java Engineer - High Performance Systems - McGregor Boyall in London

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Job Description

We are hiring an experienced Senior Software Engineer with deep expertise in ultra-low-latency, high-throughput Java systems. This is a role for someone who builds systems that push performance boundaries, not just enterprise-grade services.

You'll join a specialist engineering group designing fault-tolerant, sub-40µs latency pipelines, shaping architecture decisions and solving complex technical challenges that require first principles thinking.

What You'll Be Working On

• Designing and optimising high-performance Java services with lock-free, zero-allocation and low-GC approaches.

• Hardware-aware optimisation including CPU architecture, cache behaviour, kernel tuning, core pinning and memory layouts.

• Building and improving ultra-low-latency messaging pipelines (Multicast, TCP, IPC).

• Working directly with senior engineering leadership on system architecture and performance strategy.

• Driving technical direction and mentoring senior members of the team.

What We're Looking For

• 10+ years professional engineering experience with core Java in latency-sensitive environments.

• Strong knowledge of:

  • Ring buffers

  • Off-heap / zero-allocation techniques

  • IPC and high-performance networking

  • Linux kernel optimisation

• Domain experience in eTrading, market-making, sports betting, high-frequency messaging or telecoms is highly desirable.

• You thrive in environments where independent problem solving is key.

Why This Role Matters

This is not a feature-factory role. You will own problems, drive optimisation decisions, and shape how real-time financial markets infrastructure is engineered.

Location: UK based
Compensation: Competitive base salary + performance bonus + pension + benefits
Working Model: Hybrid flexible

McGregor Boyall is an equal opportunity employer and do not discriminate on any grounds.

If you are interested in applying for this job please press the Apply Button and follow the application process. Energy Jobline wishes you the very best of luck in your next career move.