C# backend Developer

McGregor Boyall
London, United Kingdom
Today
Posted
22 Jul 2026 (Today)
Senior Back End EngineerC# / Java | Front Office Trading | AWS | Distributed Systems

Location: London

Hybrid: 3 days in the office

We're partnering with one of the world's leading financial markets technology firms as they continue investing heavily in their electronic trading platforms.

This is an opportunity to work directly with traders, architects and principal engineers building business critical trading systems that process high volumes of transactions in real time.

Although the team primarily develops in C#, they are very open to experienced Java backend engineers looking to transition into .NET.

What you'll be doing
  • Building high performance backend trading applications
  • Designing scalable distributed systems
  • Developing APIs and backend services
  • Working closely with traders and front office stakeholders
  • Contributing to architecture and technical design
  • Modernising cloud based infrastructure
  • Working across the full software development lifecycle
What they're looking for
  • Strong commercial C# or Java experience
  • Trading systems experience in any asset class
  • Front office technology experience
  • Distributed systems knowledge
  • Cloud experience, ideally AWS
  • Good understanding of software design principles
  • Some desktop UI experience would be beneficial
  • Experience building low latency or high throughput systems is advantageous
Nice to have
  • Docker or Kubernetes
  • Messaging technologies
  • FIX Protocol
  • Microservices
  • REST APIs

McGregor Boyall is an equal opportunity employer and do not discriminate on any grounds.

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