Senior .NET Developer

Salary: £65,000 - 80,000 per year

Requirements:

• We are looking for strong experience with C# development.
• We require experience with .NET Framework and .NET Core.
• We need hands-on experience with WinForms or other desktop application development.
• We require experience working with MS SQL Server.
• We are looking for experience with refactoring and modernisation projects.
• We require experience working in agile environments.
• We need familiarity with CI/CD practices.
• We require experience with testing methodologies such as TDD.
• We are looking for cloud experience.
• We would value experience migrating legacy systems.
• We would value exposure to React or JavaScript.
• We are looking for someone comfortable working onsite regularly during the early stages of a project in a hybrid setup.

Responsibilities:

• We will have you assess, improve, and progressively enhance an established C# codebase built on older Microsoft technologies.
• We will have you help evolve a large-scale legacy platform from an on-premise desktop environment to a modern .NET Core, cloud-based architecture.
• We will have you work closely with our CTO and wider engineering team on technical direction.
• We will have you contribute to planning, collaboration, and technical workshops.
• We will have you support the transition from legacy desktop applications toward modern web and cloud platforms.
• We will have you help manage and influence a major systems transformation programme.
• We will have you work across multiple projects in the transformation pipeline.
• We will have you bring greenfield thinking within an established business.
• We will have you participate in leadership and architecture decisions.
• We will have you contribute as part of a small, collaborative engineering team.

Technologies:

• .NET Framework
• C#
• CI/CD
• Cloud
• CTO
• Support
• JavaScript
• React
• SQL
• TDD
• Web
• ASP.NET
• Frontend

More:

We are a growing, technology-led business based in Slough, undergoing a major systems transformation following a recent acquisition. This is a high-impact opportunity to join at a pivotal stage of our journey, with around 40 projects in the pipeline and the chance to shape the future of our platform. We offer hybrid working, although we would ideally like someone who can attend onsite regularly during the early stages for collaboration and technical workshops. This role offers significant technical ownership, direct access to leadership, and long-term progression as our technology function continues to grow. The salary for this position is £65,000 to £80,000 plus benefits.

last updated 33 week of 2026