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# Greenfield Systematic Trading Build | Founding C++ Engineers

- **Company:** Selby Jennings
- **Location:** London, United Kingdom
- **Experience:** Experienced
- **Salary:** £80,748
- **Contract:** Permanent contract
- **Skills:** C++ (Programming Language), Distributed Systems, Memory Management, Linux Kernel, Network Architecture, Performance Tuning, Multithreading, Concurrency, Technical Debt, Event Driven Architecture, Low Latency, Network Optimization
- **Published:** November 6, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5953378408

## About the Role

* 2-15 years of C++ engineering experience in a trading or performance-critical environment
 * Experience within HFT, electronic trading, market making, systematic trading, or other latency-sensitive domains
 * Strong understanding of Linux internals, multithreading, concurrency, memory management, and performance optimisation
 * Expertise in low-latency systems, kernel-level development, network optimisation, market data, or exchange connectivity
 * Demonstrated tenure and track record within leading technology or quantitative trading organisations

## Description

This is a genuine greenfield build: no legacy architecture, no inherited technical debt, and the opportunity to define the core trading infrastructure, engineering standards, and technology stack that will underpin the firm's systematic trading ambitions. You will work directly with a hiring manager whose background spans HFT, ultra-low-latency systems, kernel optimisation, network infrastructure, and exchange connectivity.
The Opportunity

You will be responsible for designing and building the performance-critical infrastructure that powers the firm's next-generation systematic trading platform, including:

 * Ultra-low-latency trading and execution systems
 * Market data handlers, feed processing, and normalisation pipelines
 * Exchange connectivity, order gateways, and routing infrastructure
 * High-performance distributed systems
 * Event-driven architectures operating under strict latency constraints
 * Performance-sensitive C++ components where microseconds directly impact outcomes