Fully Remote Senior .Net Developer

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