Senior .Net Developer - London

Salary: £50,000 - 55,000 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: Risk Management; Securities Lending / Prime Brokerage; Collateral, Margin, or Financing platforms
• Exposure to risk and regulatory methodologies such as RWA (Risk Weighted Assets), CCAR, and Basel III / Basel IV frameworks
• Understanding of credit risk, counterparty exposure, or capital calculations
• 10 years 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 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 closely with quants, risk managers, business analysts, and product owners to deliver robust, scalable solutions in a regulated environment.

last updated 34 week of 2026