Senior C++ Developer

Harrington Starr

Screened

City of London, Greater London

Posted 4 days ago

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About the role

Software Engineer – Execution / Trading Systems

London | Office-Based | Permanent

A high-performing market maker is looking to hire a Software Engineer to join its core engineering team building the systems that power live trading across global electronic markets.

This is a strong opportunity for an engineer who enjoys performance-critical systems, close collaboration with highly quantitative teams and solving complex technical problems where speed, reliability and precision matter.

The Opportunity

You’ll work on the firm’s core trading technology stack, helping design and optimise the infrastructure used for research, backtesting and live execution whilst also taking on the role of mentoring some graduate engineers.

The role suits someone with strong systems-level engineering capability who wants to work on real-time platforms where code quality and performance have direct commercial impact whilst also taking the lead on technical projects.

What You’ll Be Doing

Develop and maintain core trading systems used across multiple asset classes
Build high-performance, low-latency software in a production trading environment
Work closely with quantitative researchers to support research and execution tooling
Design scalable and resilient systems for live market connectivity and order flow
Optimise code, infrastructure and architecture for speed and reliability
Debug complex production issues and improve platform stability
Contribute to internal tooling for testing, replay and diagnostics
Improve performance across networking, concurrency and system resources
Help shape engineering standards and technical direction within the team

What They’re Looking For

Strong software engineering background in C++ or performance-focused systems development (6+ years experience)
Experience building low-latency or high-throughput backend systems
Informal or formal leadership experience.
Strong Linux systems knowledge
Understanding of networking and server architecture
Experience profiling, debugging and optimising production code
Strong knowledge of concurrency, multithreading or lock-free programming
Comfortable working in a fast-paced, high-performance environment
Strong problem-solving skills and technical curiosity

Desirable Experience

Financial markets or trading systems background
Experience with market data feeds or order entry protocols
Packet capture / replay / network diagnostics tooling
Exposure to quantitative research environments
Hardware-aware optimisation experience

Package

Competitive base salary
Strong bonus potential
Comprehensive benefits package
High-impact work close to revenue generation
Exposure to elite engineering and quantitative teams
Long-term progression in a performance-led environment

Find Out More

For a confidential discussion and full details on the team, compensation and opportunity, get in touch with Ciara Clarke at Harrington Starr

About this listing

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