Senior Software Engineer

🚀 Senior C# Developer – Investment Banking £750/day | Outside IR35 | 12-month rolling contract | Largely Remote I'm working with a leading investment bank looking for a strong Senior C# Developer to join a long-term project building and enhancing a large-scale Structured Notes platform. This is a hands-on engineering role with approximately 80% backend C# / 20% frontend, working on complex, distributed systems. The role: You'll be working across a modern .NET platform, designing and developing scalable backend services while contributing to the Angular frontend where required. The environment involves large-scale distributed systems, asynchronous processing, multithreading and event-driven architecture. Core technical requirements:

• Excellent C# / .NET development experience
• Strong .NET 8 knowledge
• Previous commercial Event Sourcing experience – essential
• Strong understanding of multithreading, concurrency and asynchronous programming
• Experience building large-scale distributed systems
• Strong software engineering and system design fundamentals
• Comfortable working across an existing complex codebase Frontend – around 20% of the role:
• TypeScript
• Angular
• RxJS
• Redux
• SignalR Wider stack: MongoDB | Solace | GitHub | TeamCity | Cypress | JIRA Previous experience within investment banking / capital markets is highly desirable, particularly experience working with structured products, derivatives or similar front-office systems. This is a 12-month rolling contract with strong potential for longevity. 💰 £750/day 📄 Outside IR35 🏠 Largely remote – current office attendance is optional 🏦 Investment Banking If you're a strong C# engineer with genuine Event Sourcing experience and interested in a long-term banking project, get in touch. Callum Ranson | CipherTek Recruitment