Lead Software Engineer (C#/React.js) - Top Trading Firm!

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.

Are you looking for influence and autonomy?

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)

1. CTO Intro
2. Live Technical Test
3. HR (Culture & Team Fit)

No visas sponsorship on offer, B2B/B2C contractors, or remote-only applicants.

This role requires hybrid working in London.

If this sounds like your next challenge, APPLY NOW!

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