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

Location: London (Hybrid)

Contract Duration: 6 Months

Industry: Financial Services

Are 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.

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• System Development: Design, build, and maintain high-performance C# / .NET applications supporting Risk and Securities Lending workflows.
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• API Integration: Build and consume RESTful APIs to seamlessly connect complex upstream and downstream financial systems.
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• Data & Throughput: Handle large datasets and high-throughput systems, contributing to vital exposure calculations, limits, and reporting.
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• Best Practices: Write scalable, testable, and maintainable object-oriented code, participating in architectural discussions and code reviews.
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• Cross-Functional Collaboration: Partner with Risk, Front Office, Operations, Compliance, and Product Owners to translate business needs into technical reality.
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• Production Support: Assist with incident analysis, remediation, and the ongoing support of live systems.
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Core Technical Expertise:

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• Deep, hands-on experience with C# and .NET (including .NET Core).
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• Exceptional Object-Oriented Programming (OOP) skills and architectural design principles.
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• Proven track record in designing and implementing REST/JSON APIs.
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• Solid SQL database experience (e.g., SQL Server).
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• Strong grasp of application performance, scalability, unit/integration testing, and CI/CD pipelines.
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Essential Domain Knowledge:

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• A proven background working within Financial Services technology.
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• Strong domain knowledge in at least one of the following: Risk Management, Securities Lending, Prime Brokerage, or Collateral/Margin/Financing platforms.
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Highly Beneficial / Nice-to-Have:

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• Exposure to risk and regulatory methodologies (RWA, CCAR, Basel III / IV).
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• Understanding of credit risk, counterparty exposure, or capital calculations.
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• 10+ years of commercial software engineering experience.
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• Experience with Cloud platforms (Azure/AWS) and messaging technologies (e.g., Kafka).
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• Familiarity with front-to-back trading systems and Agile/Scrum delivery.
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• You possess a strong analytical and problem-solving mindset.
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• You are highly comfortable navigating complex, highly regulated enterprise environments.
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• You can communicate complex technical concepts clearly to non-technical stakeholders.
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• You are proactive, detail-oriented, and hyper-focused on reliable delivery.
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If 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.