Contract Software Engineer (Algorithmic Trading)
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Role: Contract Software Engineer (C++)
Project: Algorithmic execution service for commodities derivatives trading platform
Industry: Commodities trading
Location: London (hybrid 3 days per week)
Contract: 6 month initial contract (multiyear scope)
Rate: £900-1200/d (inside IR35)
X4 Technology are partnered with a leading commodities trading business offering the opportunity for a Contract Software Engineer (C++) to join a small high-performing team responsible for building and enhancing algorithmic execution services for a global derivatives trading platform.
The platform spans exchange connectivity, trading engines and shared infrastructure, supporting both systematic and algorithmic trading strategies. You will work closely with traders and quants, contributing directly to trading performance, reliability and scalability.
Responsibilities of the Contract Software Engineer (Algorithmic Trading)
- Develop low-latency exchange connectivity using native exchange APIs
- Implement and optimise order handling (submission, cancellation, execution flows)
- Build and enhance trading engines supporting algorithmic strategies
- Translate quantitative trading requirements into production-grade systems
- Optimise performance (kernel bypass, TLS, connection handling)
- Contribute to distributed, multi-threaded system design
- Enhance monitoring, observability, and reliability of trading systems
- Investigate production issues (performance bottlenecks, crashes, unexpected behaviour)
- Support release cycles and deployments
- Collaborate closely with traders, quants, and wider technology teams
Requirements for the Senior C++ Engineer (Algorithmic Trading):
- Strong C++ development background within financial markets
This is a high-impact, front-office aligned role within a fast-moving programme with significant backlog and delivery demand. The team is small and highly collaborative, requiring someone dynamic, versatile, and comfortable working closely with both technology and trading stakeholders.
If you are a Senior C++ Engineer with strong exchange connectivity experience and a background in trading systems, apply now for immediate consideration.