Low-Latency Software Engineer : C++/Java : £150-200k+

Low-Latency Software Engineer : C++/Java : £150-200k+

We’re partnering with a leading global trading firm to hire a Low‑Latency Software Engineer. This is a rare opportunity to work on ultra‑low‑latency systems that process market data and execute trades at sub‑millisecond speeds – the backbone of high‑frequency trading and algorithmic strategies.

The Role

• Designing and implementing low‑latency, high‑throughput trading infrastructure in C++ and Java
• Optimising network protocols, messaging systems, and concurrency models for minimal latency
• Developing and maintaining real‑time data feeds, order routing, and execution engines
• Profiling, benchmarking, and tuning performance‑critical systems down to the nanosecond
• Collaborating with quants, traders, and other engineers to translate strategy requirements into production‑grade systems
• Concurrency & Multithreading: data structures, atomics, memory ordering
• Networking & Messaging: TCP/UDP, multicast, FIX, ZeroMQ, nanomsg
• Performance & Profiling: Linux perf, cache line optimisation, latency benchmarking
• Familiarity with Linux internals, kernel tuning
• Optional: Python for tooling and scripting

Ideal Candidate

• 3+ years of experience in low‑latency systems, trading tech, or high‑performance computing
• Deep understanding of CPU architecture, memory hierarchies, and cache optimisation
• Proven track record of building high‑throughput, deterministic systems
• Strong problem‑solving mindset and attention to detail
• Comfortable working in a high‑pressure, fast‑moving environment

Why Join?

• Work on systems that operate at the cutting edge of low‑latency trading technology
• Collaborate with elite engineers, quants, and traders from leading global markets
• Competitive compensation with performance‑linked upside
• Hybrid working in a technology‑first, engineering‑led culture

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Information Technology, Engineering, and Finance

Industries

Technology, Information and Media, Information Services, and Financial Services

Location

London Area, United Kingdom

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