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

eFinancialCareersLondonreedpublished 10/12/2026
Must-have:PythonC#AIFinTech

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