C# Developer – Equity Derivatives Technology Risk AVP

About the role

Citi is looking for a C# Developer to join its Equity Derivatives Technology Risk team in London. You will work on a multi‑year transformation of the equities platform, delivering high‑performance, resilient solutions that support global trading, clearing and margining.

Key responsibilities

• Design, develop and maintain C# applications for equity derivatives risk and post‑trade processes.
• Collaborate with senior engineers, business analysts and product partners to define next‑generation technology solutions.
• Contribute to re‑engineering efforts that improve execution speed, market connectivity and margin automation.
• Ensure code quality through unit testing, design‑pattern implementation and performance optimisation.
• Support large, complex projects in a globally distributed, dynamic environment.

Required profile

• Strong C# expertise with experience in .NET Framework and .NET 5+.
• Solid understanding of algorithms, system design/architecture and design patterns.
• Proven ability to write unit‑tested, maintainable code on large projects.
• Curious, flexible mindset with ownership, perseverance and attention to detail.
• Dependable and resourceful, comfortable working in a diverse, collaborative team.

Required skills

• C#
• .NET Framework
• .NET 5+
• Algorithms
• System design
• Architecture
• Design patterns
• Unit testing

What we offer

• Mentorship and continuous learning opportunities.
• Hybrid work model with flexibility.
• Chance to impact global finance and work on cutting‑edge technology.