CipherTek Recruitment
Senior Software Engineer
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🚀 Senior C# Developer – Investment Banking
ÂŁ750/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.
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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
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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.
đź’° ÂŁ750/day
đź“„ 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
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