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# Software Developer, C++ / Electronic Trading

- **Company:** Ncounter Technology Recruitment
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £74,032.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Algorithmic Trading, Automation of Tests, C++ (Programming Language), Profiling, Continuous Integration, Data Structures, Relational Databases, Linux, DevOps, Memory Management, Financial Information EXchange, Python (Programming Language), Multicasting, Network Protocols, Software Engineering, SQL Databases, TCP/IP, Multithreading, Computer Network Technologies, Concurrency, Low Latency, Software Performance
- **Published:** August 29, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5859991213

## About the Role

* 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 behaviour

 * Good understanding of concurrency, memory management and in-memory optimisation

 * 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

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.

## Description

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 optimising 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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