Senior C# / .NET Developer Financial Services (Risk and Securities Lending)Location: London (Hybrid)Role Type: 6 Months Contract, Rate: 585/day inside IR35Are you an expert in C# / .NET with a deep understanding of the mechanics behind Risk Management or Securities Lending? We are looking for a Senior Developer to join a leading global financial institution, building high-performance systems that drive critical trading and financing workflows.The OpportunityYou will play a pivotal role in designing and maintaining robust platforms used for complex risk calculations and high-throughput financial data processing. This is an environment where your technical expertise in Object-Oriented Programming (OOP) and API design will directly impact global operations and regulatory compliance.Key ResponsibilitiesEngineering: Build scalable, testable, and maintainable applications using .NET Core and RESTful APIs.Risk Workflows: Implement exposure calculations, limit monitoring, and reporting systems.Collaboration: Work alongside Quants, Risk Managers, and Front Office teams to translate business needs into technical reality.Architecture: Participate in high-level technical design and architectural discussions to evolve the platform.RequirementsTechnical Core: Extensive experience in C#, .NET, SQL Server, and CI/CD pipelines.Domain Expertise: Proven track record in Financial Services, specifically within Risk, Securities Lending, Prime Brokerage, or Collateral.Regulatory Knowledge: Familiar