Senior Software Engineer C# .NET Fixed Income FX

Salary: £58,000 - 98,000 per year

• Minimum 3 to 5 years experience developing with C# .NET and Microsoft web technologies, including C# and ASP.NET Core MVC.
• Relational database experience with SQL Server.
• At least 3 years experience in a comparable development role.
• Ability to build strong relationships with stakeholders, including sales, brokers, middle office, and external vendors.
• Ability to produce clean, well-written, fully tested, production-ready software.
• Knowledge of the FIX protocol is desirable.
• Knowledge of FX trade processing is desirable.
• Basic knowledge of foreign exchange products, including vanilla and exotic options and FX cash, is desirable.
• A computer science-related degree is preferred.

• Re-architect and build our in-house middle office platform and integrate it with a new trading platform.
• Develop pricing toolsets.
• Integrate with external reporting, trade flow, and pricing APIs.
• Maintain our daily operations on the existing platforms.
• Work closely with traders in a fast-paced, delivery-focused environment.
• Contribute as a key member of our global team with a high degree of autonomy.

• ASP.NET
• Architect
• C#
• CTO
• Flow
• MVC
• SQL
• Web
• Nexus

More:

We are a fast-growing, dynamic brokerage firm specialising in FX, currency options, and interest rate swaps. We are seeking a talented C# .NET Software Developer to join our London team based in the City of London. The role reports initially to our CTO and offers a great opportunity to make a genuine impact on the business in a fast-paced, delivery-focused environment with significant autonomy. The salary for this permanent full-time position is 50K - 75K.

last updated 36 week of 2026