Lead .NET Developer

3-Month Contract | £525 per day | Inside IR35 | Central Bristol (1–2 days per week onsite)

We are seeking an experienced Lead .NET Developer to join a growing engineering team delivering ongoing development and modernisation of a complex monolithic platform. This is a hands-on leadership role suited to a senior developer who thrives in stabilising legacy systems while driving forward cloud-native transformation.

The team is currently migrating workloads to AWS and transitioning the frontend from AngularJS to StencilJS web components. You will play a key role in enhancing, modernising, and future-proofing the existing platform while supporting the development of new distributed services.

Key Responsibilities

• Deliver high-quality backend development using C#, .NET Framework, and .NET Core.
• Lead efforts to decompose and migrate legacy monolithic components into AWS-based services.
• Contribute to a message-driven architecture leveraging RabbitMQ, Amazon SQS, and AWS Lambda.
• Support platform enhancements, bug resolution, and development of new features across multiple modules.
• Collaborate closely with frontend engineers during the transition from AngularJS to StencilJS.
• Work within a custom metadata-driven system powering dynamic data sources, business rules, and form generation.
• Participate actively in Agile ceremonies and collaborate with onshore (Bristol-based) and offshore engineering teams.
• Follow established CI/CD workflows using Bitbucket, Jenkins, AWS CLI abstractions, and Kubernetes.
• Champion best practices in unit testing, code quality, maintainability, and engineering standards.

Required Experience & Skills

• Extensive experience in C#, .NET Framework, and .NET Core development.
• Proven experience working with complex monolithic systems and driving modernisation initiatives.
• Strong hands-on experience with AWS services and cloud-native architecture.
• Experience implementing message-based/distributed systems.
• Solid understanding of CI/CD pipelines and containerised deployments.
• Experience working in Agile environments with distributed teams.
• Strong problem-solving skills with the ability to balance short-term stability and long-term architectural improvements.

Contract Details

• Duration: 3 Months
• Rate: £525 per day
• IR35 Status: Inside IR35
• Location: Central Bristol (1–2 days per week onsite)

This is an excellent opportunity to make a tangible impact within a modernisation programme while working on a technically challenging platform transformation.