Senior C# Developer

Senior C#. NET Developer

Location: London (Hybrid)
Contract: 6 months
IR35: Inside IR35

Our client, a leading global investment bank, is looking for an experienced C#. NET Developer to join their team on a 6-month contract. This role is pivotal in modernising and supporting business-critical applications while contributing to greenfield development initiatives.

Key Responsibilities

• Design, build, and maintain server-side and client-side applications using .NET Framework/Core , React/TypeScript , and relational databases (SQL Server , Oracle ).
• Refactor legacy systems to reduce technical debt and improve performance.
• Implement modern security patterns (OAuth2/OpenID Connect, OWASP principles).
• Optimise database queries and schemas; ensure s...