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C# Quant Developer | Risk & P&L Systems | Front Office | Contract Inside IR35

London

£775 - £800 per day

Contract

Financial Services

Posted 12 October 2026

Ref BH-237676

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Dom Jennings

Hi, I'm Dom

I manage this role

Dom Jennings

Partner

Job description

C# Quant Developer | Risk & P&L Systems | Front Office | Contract Inside IR35

Our investment banking client is looking for a strong C# developer to join its FX Options Risk & P&L technology team.

This role sits between technology, quants and trading and would suit someone with genuine understanding of risk metrics, Greeks and P&L explain frameworks.

The hiring manager is specifically looking for developers who understand the underlying concepts and calculations rather than simply consuming downstream outputs.

Alongside strong C# development capability, experience designing or supporting distributed computing environments is highly sought after.

Required Experience
  • Strong C#
  • .NET Core
  • Risk systems
  • P&L systems
  • Greeks (Delta, Gamma, Vega etc.)
  • Distributed computing concepts
  • Front Office exposure
Desired Experience
  • Grid computing
  • Redis
  • Hazelcast
  • Python
  • AI-assisted development tools
Key Responsibilities
  • Develop and support risk and P&L infrastructure
  • Work directly with traders and quants
  • Design scalable distributed systems
  • Improve performance and reliability of critical applications
  • Contribute to architectural decisions

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