C++ Engineer - Low Latency Market Data (Greenfield team)

Selby Jennings; Greater London; On-site; GBP 120,000 - 190,000; Full time

Job summary

Selby Jennings partners with a top-tier quantitative trading firm operating market-making across global electronic venues. The team is building a greenfield tick-data and market-data platform optimized for deterministic latency and extreme throughput.

The role focuses on hands-on development in C++23 on performance-critical paths, exchange connectivity, and latency profiling, with close collaboration with low-latency engineers and quantitative teams.

Qualifications

• Professional experience writing C++23 in production trading systems.
• Strong background in low-latency / high-performance systems.
• Solid understanding of Linux internals, CPU architecture, cache behaviour, memory layout, and profiling tools.

Responsibilities

• Hands-on development in modern C++23 on performance-critical hot paths.
• Exchange connectivity, feed normalisation, sequencing, and recovery logic.
• Latency profiling, optimisation, and systems architecture.
• Close work with low-latency engineers and quantitative teams.

Skills

C++23

Low-latency systems

Linux internals

Profiling tools

Job description

We're partnering with a top‑tier quantitative trading firm operating market‑making strategies across global electronic venues. The team is building a greenfield tick‑data and market‑data platform optimised for deterministic latency and extreme throughput.

Role

• Hands‑on development in modern C++23 on performance‑critical hot paths
• Exchange connectivity, feed normalisation, sequencing, and recovery logic
• Deep involvement in latency profiling, optimisation, and systems architecture
• Close work with low‑latency engineers and quantitative teams

Requirements

• Professional experience writing C++23 in production trading systems
• Strong background in low‑latency / high‑performance systems
• Solid understanding of Linux internals, CPU architecture, cache behaviour, memory layout, and profiling tools

Nice to have

• Direct exposure to market data or HFT environments