Job Description
Senior C# Developer within FX Options – Investment Banking – Greenfield Project
Location: Central London (3 days per week onsite)
Contract Type: Outside IR35
Salary / Rate: Up to ~£825 / day DOE
A leading investment banking team is embarking on a greenfield build of a high-performance pre-trade application and is seeking a Senior C# Developer with strong experience in Options (ideally FX Options) to join them at inception of the project.
This is a rare opportunity to influence best practices from the ground up, working directly with the FX Options trading desk to design and build a system that handles large volumes of market data in near real-time.
Key Responsibilities:
1. Design and develop scalable, high-performance systems using modern C# .Net (version 9)
2. Build and integrate APIs and microservices to support trading workflows
3. Collaborate closely with FX Options traders to understand business requirements and deliver tailored solutions
4. Contribute to architectural decisions and establish development standards for a greenfield application
5. Participate in the migration of legacy monolithic systems to microservices
6. (Optional) Support front-end development using Rea...