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Senior Java Developer | Low Latency | London

SGI
London
2 days ago
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Senior Java Developer | Low Latency | London


Our client is a specialist engineering consultancy known for solving some of the most demanding performance challenges across financial markets and technology. Their teams design, build, and optimise high-throughput, low-latency systems used by global institutions where reliability and speed are critical.


They are now looking for exceptional Java Engineers with proven experience in building high-performance, low-latency systems. This role involves working on complex, business-critical projects where every microsecond matters.


You’ll join a highly technical team known for solving tough engineering challenges and delivering efficient, elegant solutions across banking, trading, and financial technology environments.


📍Location: Primarily Remote, with travel to London City at least twice per week.

đź’·Package: Highly competitive base + benefits


What You’ll Do

  • Design, build, and maintain high-performance Java applications used in demanding real-time systems.
  • Develop and enhance testing and benchmarking frameworks to validate system performance.
  • Identify and eliminate bottlenecks through systematic performance analysis.
  • Contribute ideas and innovations to improve architecture and speed.
  • Quantify and document measurable performance improvements.


Requirements:

  • Degree-level education (or equivalent experience).
  • A strong and proven track record developing low-latency, high-throughput systems on JVM.
  • Understanding of JVM internals (GC, threading, concurrency, locking).
  • Commercial experience with high-performance Java systems.
  • Ability to communicate effectively with both technical and non-technical stakeholders.
  • Ability to work confidently across existing and greenfield projects.
  • Maintaining a high level of professionalism and precision.
  • Exposure to trading, banking or fintech environments is highly beneficial, particularly with front office trading.
  • Experience in a software consultancy or client-facing engineering role.

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