Reference: 56520Location: London, United KingdomSalary: 90,000 per annumOverview An opportunity for a skilled C# Developer to join a financial services technology team delivering high-performance,secure and resilient systems. You will work across the full software development lifecycle, collaborating withengineering, QA, product and stakeholders to build and enhance solutions used in regulated environments. Key Responsibilities Design, build and maintain backend services and APIs using C# and .NET.Develop scalable, low-latency components with a focus on performance, reliability and security. Work with relational databases (SQL Server preferred), including schema design, query optimisation and stored procedures where appropriate. Integrate with internal and third-party systems using REST and messaging patterns. Write clean, testable code; create unit and integration tests and support automated CI/CD pipelines. Participate in code reviews, technical design discussions and incident/problem management. Contribute to documentation, operational readiness, monitoring and continuous improvement. Essential Requirements Strong commercial experience with C# and modern .NET (.NET 6+), including asynchronous programming and dependency injection. Experience building RESTful APIs and service-oriented architectures (microservices beneficial).Solid knowledge of SQL and database fundamentals; familiarity with ORM tools (e.g., Entity Framework) and performance tuning. Experience with automated testing (xUnit/NUnit/MSTest), mocking and test-driven practices. Understanding of secure coding principles, authentication/authorisation (OAuth2/OpenID Connect) and data protection. Comfortable with Git, branching strategies and CI/CD (e.g., Azure DevOps, GitHub Actions or similar).Strong communication skills and experience working in Agile/Scrum teams. Eligibility to work in the UK. Desirable Financial services domain exposure (payments, trading, risk, compliance or core banking).Cloud experience (Azure or AWS), containers (Docker) and orchestration (Kubernetes).Messaging/event streaming (Kafka, RabbitMQ, Azure Service Bus) and distributed systems patterns. Observability tooling (logging, metrics and tracing) and production support experience. What You'll Bring A pragmatic approach to delivery with attention to quality and detail. Ability to work effectively with stakeholders in a regulated, audit-conscious environment. A continuous learning mindset and willingness to mentor and share best practice.
Software Developer {C#, .NET SQL} in London employer: Source Group International
As a Lead Data Engineer in London, you will join a forward-thinking company that prioritises innovation and employee development. With a strong emphasis on collaboration and mentorship, the work culture fosters continuous learning and growth, while competitive salaries and comprehensive benefits ensure a rewarding experience. The vibrant London location offers unique networking opportunities and access to a diverse tech community, making it an excellent place for professionals seeking meaningful and impactful work.
Contact Details:
Source Group International Recruitment Team
