The Client

A growing trading and technology business in the City of London is looking to add a C# Software Engineer to its development team. The firm works in close partnership with Tempest Vane Partners and is expanding its engineering capability as its products and trading activity scale.

You’ll be joining a small, highly capable group of engineers and researchers who build the systems used day-to-day to analyse markets and execute trading strategies. Decision-making is pragmatic and engineering-led. Ideas are encouraged, feedback is direct, and there’s minimal corporate process in the way.

Why Join:

• Competitive salary with benefits including private medical cover, pension, and gym membership
• A genuinely flat team structure where developers are trusted to contribute
• Exposure to both new development and the evolution of existing, revenue-generating systems
• Clear room to grow technically and take on more responsibility over time
• Sensible working hours, a supportive environment, and regular team socials

What You’ll Be Working On

This role is hands-on and development-focused. You’ll be involved in improving existing applications as well as building new functionality alongside experienced engineers.

Your day-to-day will include:

• Writing and maintaining production code using C#/.NET
• Working with SQL Server to support data-driven applications
• Developing new features from initial idea through to release
• Collaborating with researchers to turn analytical concepts into working software
• Learning how to write performant, well-structured, and testable code in a trading environment
• Gradually taking ownership of components as your confidence and experience grow

What We’re Looking For

Essential experience:

• A minimum of 2 years of commercial software development experience
• Strong practical experience with C# and the .NET ecosystem
• Experience working with relational databases (SQL Server, Oracle, or similar)
• A solid understanding of core software engineering principles
• Comfortable communicating within a small, technical team

Useful but not required:

• Exposure to ASP.NET or web-based systems
• Experience with multi-threaded or asynchronous programming
• Familiarity with Git or other version control tools
• Any experience in financial services, trading, or data-heavy systems

Interested?

If you’re a C# developer at the mid-level stage of your career and want to deepen your technical skills in a trading-focused environment without layers of red tape, we’d be keen to speak with you.