Senior Software Developer with C# .Net and Fixed Income

Company: Nexus Jobs
Apply for the Senior Software Developer with C# .Net and Fixed Income
Location: London
Job Description:

Overview

In this role you will design and deliver key components of a fast-growing FX brokerage’s trading infrastructure. You will re-architect the middle-office platform and integrate with a new trading platform, while building pricing tools and ensuring reliable production systems. You’ll work closely with traders and cross-functional teams to deliver impactful software in a fast-paced environment. The role offers autonomy and a chance to shape critical financial workflows on FX and fixed income products.

Responsibilities

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

Key requirements

  • Minimum 3–5 years experience of Microsoft web technologies (C#, ASP.NET Core MVC)
  • Relational database experience (SQL Server)
  • Proactively build relationships with stakeholders (sales, brokers, middle office, external vendors)
  • Ability to produce clean, well-written, fully tested production-ready software
  • Stakeholder relationship building
  • Resilience in a fast-paced trading environment
  • Delivery-focused collaboration
  • C#
  • ASP.NET Core MVC
  • SQL Server

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Posted: September 26th, 2026