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Ultra-Low Latency C++ Engineer (High-Frequency Trading)

NJF Global Holdings Ltd
City of London
2 weeks ago
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Ultra-Low Latency C++ Engineer | High-Frequency Trading

Salary: £150k-£225k

Total compensation: £250k-500k depending on performance and seniority


A leading quant/systematic trading firm have multiple headcount for Ultra-Low Latency C++ Engineers to join their High-Frequency Trading team in London.


The teams focus is building ultra-low-latency systems operating at global scale.


They're seeking experienced C++ engineers passionate about performance optimization and elegant system design where nanoseconds matter!


What You'll Do:

  • Design and optimize latency-critical C++ systems across trading, market data, and infrastructure components
  • Performance engineering at every layer: CPU, cache, memory, and network
  • Profile, benchmark, and fine-tune system behaviour under real-world conditions
  • Collaborate with hardware and FPGA engineers on end-to-end architecture design
  • Kernel-level optimization and low-level systems tuning


Required:

  • 5+ years developing performance-critical C++ applications (modern C++ standards)
  • Strong systems programming and low-level understanding
  • Expertise in Linux internals, kernel tuning, and low-level profiling tools
  • Genuine curiosity about hardware behaviour, networking, and system optimization


Why Join:

  • Work on systems where nanosecond optimizations have measurable impact
  • Collaborate with world-class engineers across disciplines (software, FPGA, infrastructure)
  • Technology-first culture that values innovation and technical excellence
  • Solve challenging problems at the cutting edge of performance engineering

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