Job Description
Senior/Lead Software Engineer (C# / React.js) – Top Trading Firm!
Location: London (Hybrid: 3 onsite / 2 WFH)
Robert Half Ltd is representing this role.
One of the strongest engineering roles in London right now.
Join a leading trading firm that is rebuilding its entire core platform from the ground up greenfield, modern, high-impact.
You’ll be working directly with the CTO on mission-critical systems used across trading and structured products.
What You’ll Work On:
* Full greenfield rebuild of legacy trading systems
* Modern full-stack engineering: C#/.NET + React.js
* High-performance, multithreaded architectures
* Close collaboration with product, trading, and a 15+ engineering team
What We’re Looking For:
* Strong C#/.NET engineering background
* Solid React.js (or modern JS with willingness to grow fast)
* Experience in financial services / trading systems
* Ownership mindset — hands-on, ideas-driven, and proactive
Interview Process (Fast Turnaround)
* CTO Intro
* Live Technical Test
* HR (Culture & Team Fit)
No visas, sponsorship, B2B/B2C contractors, or remote-only applicants.
This role requires hybrid working in London.
If this sounds like your next challenge, APPLY NOW or message me directly.