Ncounter Technology Recruitment
C++ Software Developer
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Software Developer, C++ / Electronic Trading
London | Hybrid | Permanent
Ncounter is supporting the growth of a specialist electronic trading technology team responsible for building and enhancing high-performance systems operating across global financial markets. We are looking for an experienced Software Developer with strong C++ skills and a background working on low-latency trading technology.
You’ll work on business-critical applications including matching engines, FIX gateways and real-time trading systems, where performance, availability, and efficient processing are fundamental. This is a hands-on development role with considerable exposure to C++, alongside Java, Python, and JavaScript within a predominantly Linux environment.
What you’ll be working on
- Designing and developing high-performance matching engines, FIX gateways, and electronic trading applications
- Building low-latency, multithreaded systems using C++ and Java
- Processing real-time market and trading data through highly available systems
- Developing efficient in-memory data structures, lock-free queues, and circular buffers
- Working with TCP/IP, UDP, multicast, and other networking technologies
- Troubleshooting, profiling, and optimizing performance-critical production applications
- Supporting automated testing, DevOps practices, and CI/CD pipelines
- Working closely with trading, product, and infrastructure teams throughout the development lifecycle
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What we’re looking for
- 5+ years of professional software development experience
- Strong C++ development skills, ideally alongside commercial Java experience
- Hands-on FIX protocol experience within electronic trading
- Experience building low-latency, high-frequency, or performance-critical systems
- Strong Linux knowledge covering multithreading, sockets, IPC, and system-level behavior
- Good understanding of concurrency, memory management, and in-memory optimization
- Knowledge of NUMA architectures and performance-focused programming techniques
- Experience with networking protocols including TCP/IP, UDP, unicast, and multicast
- Python, SQL, and relational database experience would be useful
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This is an opportunity to work close to the core of electronic trading, solving challenging engineering problems where software performance has a direct business impact.
If you have strong C++ engineering experience alongside FIX and low-latency trading systems, get in touch with Ncounter for a confidential discussion.
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