Senior C# .NET FX & Fixed Income Engineer

  • Onyx-Conseil
  • 04/05/2026
Full time Information Technology Telecommunications

Job Description

Onyx-Conseil is seeking a C# .NET Software Developer with 3-5 years of proven experience to join their dynamic team in London. The role involves developing pricing toolsets, re-architecting the middle office platform, and maintaining existing systems. Candidates with knowledge of FX trade processing and the FIX protocol are preferred. A Computer Science degree is preferred. The position offers a salary between £50K and £75K, providing a fast-paced work environment and significant autonomy.