Job Title: Senior C# / .NET Developer – Financial Services (Risk / Securities Lending)
Location: London (Hybrid)
Duration: 6 Months contract


Job Description
Role Overview
*We are seeking an experienced C# / .NET Developer to join a technology team supporting critical Financial Services platforms, with a strong focus on Risk Management and/or Securities Lending domains.
*The role involves designing, building, and supporting high performance systems used for risk calculations and trading/financing workflows.
*You will work closely with quants, risk managers, business analysts, and product owners to deliver robust, scalable solutions in a regulated environment.
Key Responsibilities
*Design, develop, and maintain C# / .NET applications supporting Risk or Securities Lending platforms
*Build and consume RESTful APIs to integrate with upstream/downstream systems
*Implement scalable, testable, and maintainable object oriented code following best practices
*Contribute to risk workflows including exposure calculations, limits, and reporting
*Work with large data sets and high throughput systems typical of financial services
*Participate in code reviews, architectural discussions, and technical design sessions
*Collaborate with cross functional teams (Risk, Front Office, Operations, Compliance)
*Support production systems and assist with incident analysis and remediation
Required Skills & Experience
Core Technical Skills
*Strong hands on experience with C# and .NET (.NET Core / .NET)
*Excellent Object Oriented Programming (OOP) skills and design principles
*Proven experience designing and implementing APIs (REST / JSON)
*Solid understanding of application architecture, performance, and scalability
*Experience with SQL databases (e.g. SQL Server)
*Familiarity with unit testing, integration testing, and CI/CD pipelines
Financial Services Domain Knowledge (Essential)
*Experience working in Financial Services technology environments
*Strong domain knowledge in at least one of:
* o Risk Management
* o Securities Lending / Prime Brokerage
* o Collateral, Margin, or Financing platforms
Risk & Regulatory Experience (Highly Beneficial)
*Exposure to risk and regulatory methodologies such as:
* o RWA (Risk Weighted Assets)
* o CCAR
* o Basel III / Basel IV frameworks
*Understanding of credit risk, counterparty exposure, or capital calculations is a strong advantage
Nice to Have
*10+ years experience
*Experience with cloud platforms (Azure / AWS)
*Messaging technologies (e.g. Kafka)
*Experience in front to back trading or financing systems
*Familiarity with Agile / Scrum delivery methodologies
Personal Attributes
*Strong problem solving and analytical mindset
*Comfortable working in complex, regulated environments
*Able to communicate effectively with both technical and non technical stakeholders
*Proactive, delivery focused, and detail oriented