Senior Software Engineer (.NET / React / AWS)
£650/day (Inside IR35)
Manchester (Hybrid – 1–2 days per week)
6 Month Contract

We’re working with a large-scale, technology-led business investing heavily in a greenfield platform build, and they need a Senior Software Engineer to play a key role in shaping it from the ground up.

This isn’t a narrow frontend role.

The frontend is central to the product, but you’ll be operating across the wider platform, working closely with backend services, APIs, and cloud infrastructure to deliver a high-performance, scalable system end-to-end.

What you’ll be doing:

• Building and scaling a modern React / Next.js application at the core of the platform
• Contributing to micro-frontend architecture (Module Federation)
• Working closely with backend engineers on API design, data flow, and system integration
• Developing and integrating with .NET / C# backend services
• Deploying and supporting applications within AWS (CloudFront, S3, etc.)
• Designing performant, scalable user experiences for a high-traffic platform
• Staying hands-on while contributing to technical direction within your squad

What they’re looking for:

• Strong experience with React / Next.js in production environments
• Solid exposure to .NET / C# backend development (APIs, services, integrations)
• Experience working within micro-frontend architectures or similar scalable frontend patterns
• Good understanding of AWS and how applications are deployed and served
• Strong grasp of API-driven architecture and frontend/backend interaction
• Experience building scalable, high-performance platforms
• Comfortable operating as a senior, hands-on engineer within a product-led team

The environment:

• Greenfield build – no legacy constraints, built properly from day one
• Modern engineering practices across frontend and backend
• Product-led squads with high ownership and autonomy
• Platform being built at genuine scale, not a side project

If you’re an engineer who enjoys owning the frontend experience while understanding and contributing to the backend platform, this is a strong opportunity to get involved in something meaningful from the start.