C# .NET FX & Fixed Income Trading Tech Developer

Onyx-Conseil; Greater London; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

Onyx-Conseil, a niche boutique broker specialising in FX, is seeking a C# .NET Software Developer with 3–5 years of experience to join their London team. You will work on the in-house middle office platform and a new trading platform, interfacing with pricing and reporting APIs.

The role requires resilience as you will work closely with traders on FX and Fixed Income projects; knowledge of FX instruments and trade processing is a plus.

Qualifications

• 3–5 years experience with Microsoft web technologies (C#, Core MVC).
• Relational database experience (SQL Server).
• Proactively build relationships with sales, brokers, middle office and vendors.
• Produce clean, well-written, fully tested production-ready software.
• Desirable: knowledge of FX trading/instrument processing (FX, Fixed Income).

Responsibilities

• Re-architect and build the in-house middle office platform and integrate with a new trading platform.
• Develop pricing toolsets to support trading workflows.
• Integrate with external reporting/tradeflow and pricing APIs.
• Maintain daily operations on existing platforms.

Skills

C# .NET

Stakeholder management

Production quality

FX knowledge

Education

Computer Science degree

Tools

SQL Server

Pricing toolsets

Job description

Onyx-Conseil, a niche boutique broker specialising in FX, is seeking a C# .NET Software Developer with 3–5 years of experience to join their London team. You will work on the in-house middle office platform and a new trading platform, interfacing with pricing and reporting APIs.

The role requires resilience as you will work closely with traders on FX and Fixed Income projects; knowledge of FX instruments and trade processing is a plus.