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# Senior C++ FIX Protocol & Exchange Connectivity Engineer

- **Company:** Templeton and Partners Ltd
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £156,000.0 - £194,480.0
- **Contract:** Temporary contract
- **Skills:** Application Programming Interfaces (APIs), Algorithmic Trading, Algorithm Design, C Sharp (Programming Language), C++ (Programming Language), Software Quality, Computer Networks, Data Structures, Linux, Distributed Systems, Financial Information EXchange, Hypertext Transfer Protocols (HTTP), Python (Programming Language), Performance Tuning, Windows PowerShell, Release Management, Software Deployment, Software Engineering, SQL Databases, TCP/IP, TypeScript, WebSocket, Rust (Programming Language), Multithreading, Low Latency, Asynchronous Programming, Api Design, C++14
- **Published:** October 15, 2026
- **Apply:** https://www.careerboard.com/gb/en/find-jobs-in-United-Kingdom/-99CE24C9DD5061497B/

## About the Role

* 5+ years of commercial C++ development experience within Financial Services, Electronic Trading, Commodities, Capital Markets, or Investment Banking
 * Strong experience developing FIX Protocol connectivity solutions
 * Proven track record building and supporting low-latency, high-performance distributed systems
 * Strong understanding of multithreaded, concurrent, and asynchronous programming
 * Experience with exchange connectivity, market data feeds, order management systems (OMS), or electronic trading platforms
 * Solid understanding of networking concepts and protocols, including FIX, TCP/IP, WebSocket, and API-based integrations
 * Excellent knowledge of algorithms, data structures, and performance optimisation techniques
 * Strong analytical and problem-solving skills with the ability to troubleshoot complex production issues
 * Experience with Scripting and automation using Python, PowerShell, C#, SQL, or similar technologies
 * Experience with software deployment, release management, and operational best practices

Highly Desirable

 * Experience working directly with traders, quantitative analysts, and trading support teams
 * Understanding of the full trading life cycle, including order capture, execution, allocation, settlement, and regulatory requirements
 * Experience within electronic trading, commodities trading, market making, hedge funds, exchanges, or investment banking environments
 * Knowledge of low-latency networking and performance tuning techniques
 * Exposure to Linux-based trading environments, * Excellent communication skills with the ability to engage effectively with traders, developers, and senior stakeholders
 * Comfortable operating in fast-paced, high-pressure trading environments
 * Proactive, self-motivated, and delivery-focused
 * Strong ownership mentality with a passion for building reliable, high-performance systems
 * Able to manage competing priorities and thrive under demanding deadlines
 * Naturally curious with a desire to solve complex technical and business challenges

## Description

We are partnering with a leading global trading organisation seeking a Senior C++ FIX Protocol & Exchange Connectivity Engineer to join a high-performing technology team responsible for developing and supporting mission-critical electronic trading platforms.

This is an exciting opportunity to work at the core of a sophisticated trading environment, building low-latency exchange connectivity solutions that process Real Time market data and execute orders across global financial markets. Working closely with traders, quants, and trading operations teams, you'll play a key role in delivering highly scalable and resilient trading infrastructure.

The Opportunity

As a Senior C++ FIX Protocol & Exchange Connectivity Engineer, you will design, develop, and optimise software that connects directly to exchanges using industry-standard trading protocols. You'll be responsible for ensuring reliable, high-performance exchange connectivity whilst contributing to the development and enhancement of automated trading systems., * Design, develop, and maintain exchange connectivity solutions using modern C++

 * Build software that communicates directly with exchanges using FIX Protocol, WebSocket, and HTTP APIs
 * Develop and support market data handlers, order gateways, and order routing systems
 * Optimise exchange communications through techniques such as network tuning, TLS optimisation, and low-latency connectivity improvements
 * Research exchange-specific behaviour and protocol requirements to ensure optimal performance and compliance
 * Integrate and enhance exchange SDKs using technologies including C++, Rust, Python, and TypeScript
 * Develop, maintain, and extend automated testing frameworks to ensure software quality, stability, and performance

Trading Systems & Algorithm Development

 * Implement trading algorithms and enhancements based on requirements from traders and quantitative teams
 * Translate trading and business requirements into robust, high-performance software solutions
 * Continuously improve the stability, reliability, scalability, and performance of the trading engine
 * Work closely with Trading Operations teams to improve monitoring, observability, and operational tooling
 * Investigate and resolve production issues, including latency bottlenecks, performance degradation, and system failures
 * Support software releases, deployments, and production rollouts of new trading platform functionality