Senior Full Stack .Net Developer

Contract C# | .NET | ASP.NET Core | Vue 3 | TypeScript | REST APIs

£400–£450 per day | Outside IR35 | Remote UK | Contract

We’re looking for an experienced Senior Full Stack .NET Developer / .NET Contractor to join a global SaaS engineering environment, working across backend services and a modern web application.

This is a UK-based remote contract working with an international engineering team across the UK, New Zealand, US and Canada.

You MUST be UK based to be considered.

The Role

You'll be hands-on across C#, .NET, ASP.NET Core Web APIs, Vue 3 and TypeScript, developing new functionality and enhancing an established SaaS platform.

You'll work across:

• C# / .NET / ASP.NET Core / .NET 5+
• Vue 3 / TypeScript / Composition API / <script setup>
• REST APIs & backend services
• Automated testing & maintainable code
• GitHub & modern development practices
• AI-assisted development tools such as Claude Code

You'll be joining an established distributed engineering team, so strong remote working, written communication and asynchronous collaboration skills are important.

What We're Looking For

Strong commercial C# / .NET and ASP.NET Core development experience is essential, combined with genuine hands-on Vue 3 and TypeScript experience.

You'll need to be comfortable working across an existing codebase, writing automated tests alongside production code and using modern AI coding/development tools as part of your workflow.

Experience with PHP/Laravel, Microsoft Graph, Microsoft 365 integrations, Google Calendar APIs or Google Workspace would be a bonus.

Important – New Zealand Team Overlap

The role is flexible and remote, but you'll need some regular weekly overlap with the New Zealand engineering team, ideally during their 8:00–11:00am NZ working window. Exact days can be agreed.

£400–£450 per day | Outside IR35 | Remote UK

If you're a Senior .NET Developer, Full Stack .NET Developer, C# Developer, .NET Contractor or Senior Software Engineer with strong C#/.NET + Vue 3/TypeScript experience, apply today.

UK-based contractors only.

Key Skills: C#, .NET, ASP.NET Core, .NET 5+, Web API, REST API, Vue 3, Vue.js, TypeScript, Composition API, Full Stack Development, Automated Testing, GitHub, SaaS, AI Coding, Claude Code, PHP, Laravel, Microsoft Graph, Google APIs.