C++ developer Job London area,Greater London England UK,Software Development

Location: Greater London

As a Senior C++ Engineer, you will be a member of a small, high performing team responsible for global derivatives algorithmic trading platform. Working closely with technologists, quants and traders to develop our in‑house trading technology and optimise it to achieve market‑leading performance and reliability.

Our proprietary trading platform includes everything from venue connectivity (feed handlers and ordering gateways) to trading engines to shared platforms that enable us to work quickly and efficiently – we are proud of our open and collaborative culture, so you'll have plenty of opportunity to find what fits you best.

Key Activities Exchange Connectivity

Write software that communicates with exchanges through their APIs, receiving market data and sending orders over the network in different protocols, such as FIX, Web Socket or HTTP requests
Ensure quality of software based on a set of testing suites, which you are expected to use, maintain and extend
Optimize exchange communication through kernel bypass, optimising TLS or the connection handling to an exchange
Research exchange behaviour in detail to align our behaviour to that of an exchange
Implement these solutions using the provided exchange SDKs in different languages such as C++, Rust, Python, Type Script

Trading Strategies

Implement trading algorithms based on requirements provided by traders and quants
Acquire and develop the necessary trading knowledge to successfully translate the requirements into actual software implementation
Continuously improve the stability, reliability, and performance of the trading engine
Enhance monitoring and observability in collaboration with the Trading Operations team
Investigate and resolve production issues such as crashes, unexpected business logic behaviour, and performance bottlenecks
Prepare for releases and deployments of new trading engine versions

Key Skills and Experience required

5+ years post‑graduation professional C++ software development experience within the Financial industry
Solid understanding of parallel, asynchronous, and multithreaded programming to build distributed systems
Good knowledge of algorithms and data structures
Strong analytical and problem‑solving skills, with the ability to analyse complex data sets and propose innovative solutions
Understanding of trading lifecycle, including order capture & execution, allocation workflow, settlement, and compliance requirements
Must have strong technical skills in scripting, Python, Power Shell, C#, SQL or other programming languages
Solid track record in application deployment best practices
Proactive system monitoring and troubleshooting, owning reliability improvements and ensuring their successful delivery

Soft Skills

Excellent communication skills to interact with traders, developers, and stakeholders
Thrives in high‑pressure situations while working alongside traders, developers and other engineering teams
Proactive, self‑motivated, and flexible with a positive attitude
Ability to work under demanding deadlines with changing priorities in a trading room environment
Ambition to solve open‑ended problems using analytical methods

Mandatory Skills

C++ Application Programming

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