6-Month contract – Inside IR35 – up to £500 per day
London based – hybrid working – 3 days a week onsite
Banking sector – must have previous experience
Role Overview
We are seeking experienced Senior C# .NET Developers to join a strategic technology transformation programme within a leading international banking environment.
The successful candidates will design, develop and enhance enterprise-grade applications supporting critical business functions across front-office, middle-office and back-office domains. They will work closely with Solution Architects, Technical Analysts, Business Analysts, Data Engineers and QA teams to deliver scalable, secure and high-performing solutions in a highly regulated environment.
Key Responsibilities
- Design, develop and maintain enterprise applications using C# and .NET.
- Develop scalable, secure and high-performance APIs, services and distributed applications.
- Work with Technical Analysts and business stakeholders to translate requirements into technical solutions.
- Contribute to solution architecture, technical design and code reviews.
- Develop RESTful APIs and integration services.
- Implement monitoring, logging and error handling.
- Work with relational and non-relational databases.
- Develop automated unit, integration and regression tests.
- Support CI/CD and DevOps practices.
- Troubleshoot production issues and perform root-cause analysis.
- Follow engineering, security and development standards.
- Support application modernisation and cloud adoption.
Mandatory Skills
- .NET Core / .NET 6+
- ASP.NET Core / Web API
- REST APIs and microservices
- SQL Server, including complex queries, stored procedures and optimisation
- Entity Framework / ORM
- Object-oriented design and design patterns
- Distributed systems and enterprise integration
- Unit and automated testing
- Azure DevOps, Git and CI/CD
- Strong troubleshooting and problem-solving capability
- Good stakeholder communication
- Kafka, RabbitMQ or Azure Service Bus
- Event-driven architectures
- React / Angular
- Application observability and performance engineering
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