Senior .Net Developer

Salary: £60,000 - 85,000 per year

Requirements:

• 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
• Experience working in Financial Services technology environments
• Strong domain knowledge in at least one of the following: Risk Management, Securities Lending / Prime Brokerage, or Collateral, Margin, or Financing platforms
• Exposure to risk and regulatory methodologies such as RWA (Risk Weighted Assets), CCAR, or Basel III / Basel IV frameworks
• Understanding of credit risk, counterparty exposure, or capital calculations is a strong advantage
• 10+ years of experience
• Experience with cloud platforms (Azure / AWS)
• Experience with messaging technologies (e.g. Kafka)
• Experience in front-to-back trading or financing systems
• Familiarity with Agile / Scrum delivery methodologies
• 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

Responsibilities:

• Design, develop, and maintain C# / .NET applications supporting Risk or Securities Lending platforms
• Build and consume RESTful APIs to integrate with upstream and 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

Technologies:

• AWS
• Azure
• C#
• CI/CD
• Cloud
• Support
• JSON
• Kafka
• OOP
• REST
• SQL
• ASP.NET

More:

We are seeking an experienced Senior C# / .NET Developer to join our technology team supporting critical Financial Services platforms, with a strong focus on Risk Management and/or Securities Lending domains. This is a 6-month contract role based in London with a hybrid working arrangement. You will work with quants, risk managers, business analysts, and product owners to deliver robust, scalable solutions in a regulated environment.

last updated 34 week of 2026