Senior C# / .NET Developer | Risk & Securities Lending

Senior C# / .NET Developer | Risk & Securities LendingLocation: London (Hybrid) Contract Duration: 6 Months Industry: Financial Services About the OpportunityAre you a seasoned C# engineer with a deep understanding of financial markets? We are seeking an experienced Senior C# / .NET Developer to join a high-performing technology team supporting critical Risk Management and Securities Lending platforms. In this 6-month hybrid contract, you will play a pivotal role in designing, building, and supporting high-performance systems used for complex risk calculations and trading/financing workflows. Working closely with quants, risk managers, and the Front Office, you will deliver scalable, robust solutions in a fast-paced, regulated environment. What You Will Do • System Development: Design, build, and maintain high-performance C# / .NET applications supporting Risk and Securities Lending workflows. • API Integration: Build and consume RESTful APIs to seamlessly connect complex upstream and downstream financial systems. • Data & Throughput: Handle large datasets and high-throughput systems, contributing to vital exposure calculations, limits, and reporting. • Best Practices: Write scalable, testable, and maintainable object-oriented code, participating in architectural discussions and code reviews. • Cross-Functional Collaboration: Partner with Risk, Front Office, Operations, Compliance, and Product Owners to translate business needs into technical reality. • Production Support: Assist with incident analysis, remediation, and the ongoing support of live systems. What We Are Looking ForCore Technical Expertise: • Deep, hands-on experience with C# and .NET (including .NET Core). • Exceptional Object-Oriented Programming (OOP) skills and architectural design principles. • Proven track record in designing and implementing REST/JSON APIs. • Solid SQL database experience (e.g., SQL Server). • Strong grasp of application performance, scalability, unit/integration testing, and CI/CD pipelines. Essential Domain Knowledge: • A proven background working within Financial Services technology. • Strong domain knowledge in at least one of the following: Risk Management, Securities Lending, Prime Brokerage, or Collateral/Margin/Financing platforms. Highly Beneficial / Nice-to-Have: • Exposure to risk and regulatory methodologies (RWA, CCAR, Basel III / IV). • Understanding of credit risk, counterparty exposure, or capital calculations. • 10+ years of commercial software engineering experience. • Experience with Cloud platforms (Azure/AWS) and messaging technologies (e.g., Kafka). • Familiarity with front-to-back trading systems and Agile/Scrum delivery. About You • You possess a strong analytical and problem-solving mindset. • You are highly comfortable navigating complex, highly regulated enterprise environments. • You can communicate complex technical concepts clearly to non-technical stakeholders. • You are proactive, detail-oriented, and hyper-focused on reliable delivery. How to ApplyIf you have the technical depth and the financial domain expertise to hit the ground running, we want to hear from you. Apply now at Prasanna . merugu @ randstaddigital . comwith your updated CV to be considered for this immediate contract opportunity. Randstad Technologies is acting as an Employment Business in relation to this vacancy.