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# Software Reliability Engineer -Market Data & Trading Technology

- **Company:** Selby Jennings
- **Location:** London, United Kingdom
- **Experience:** Experienced
- **Salary:** £77,935
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Algorithmic Trading, C++ (Programming Language), Computer Programming, Data as a Services, Software Debugging, Linux, Python (Programming Language), Software Engineering, Reliability of Systems, Information Technology
- **Published:** November 12, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5962723461

## About the Role

A leading quantitative investment firm is growing its London technology team and looking for a Software Reliability Engineer with 2-5 years' experience to work on real-time market data and production trading systems., This is a language-agnostic engineering role. Your primary language can be Python, Java or C++. The emphasis is on engineering fundamentals, systems knowledge and your ability to troubleshoot complex production environments.

 * 2-5 years' professional experience in software, reliability or production engineering
 * Strong programming ability in Python, Java or C++
 * Strong academic foundation in Computer Science, Mathematics, Engineering, Physics or another technical discipline
 * Strong Linux, networking and systems fundamentals
 * Experience supporting business-critical production systems
 * Market data production support or trading-desk support experience

A strong opportunity for an early-career engineer who already has exposure to market data or trading technology and wants to deepen their experience within a highly technical quantitative environment.

## Description

Sitting between software engineering, SRE and trading technology, the role focuses on ensuring critical market-data services remain reliable, performant and resilient in live trading environments.

What you'll work on

 * Real-time market data processing and distribution
 * Reliability and performance of production trading systems
 * Debugging across software, Linux and networking
 * Automation, monitoring and internal engineering tooling
 * Performance and latency analysis
 * Working closely with trading and engineering teams on production-critical systems