Staff .NET Backend Engineer (Contract)

Build and evolve core Back End services powering a large-scale property technology platform

We're supporting a well-established, product-led technology business that's continuing to modernise and scale the Back End services behind its core platform. This is a critical engineering role within a mature but evolving environment, focused on building robust, cloud-native services that support real-world, high-volume usage.

This role suits an experienced contractor who enjoys owning Back End systems end-to-end, working in production environments, and influencing how services are designed, built and shipped, not just delivering tickets.

You'll operate as a Staff-level, hands-on engineer, Embedded within a product squad and working closely with senior engineering leadership to set technical standards and deliver meaningful outcomes.

The role

This is a product-focused Back End engineering position, not a support or maintenance role:

• Design, build and ship cloud-native Back End services using C# and .NET (Core 8/9)
• Own features end-to-end, from early problem discussions through to production delivery
• Build and evolve event-driven systems using AWS serverless technologies
• Design and optimise data models across relational and NoSQL databases
• Create clean, well-documented APIs with a strong focus on developer experience
• Partner closely with BAs, Principal Engineers and delivery teams to shape solutions
• Influence architectural decisions and raise engineering standards across the squad
• Mentor engineers through code reviews, pairing and technical guidance
• You'll be joining a collaborative engineering group with strong technical leadership, clear ownership, and the space to make real impact.

What they're looking for

• Senior/Staff-level Backend Engineer with strong ownership mindset
• Deep hands-on experience with C# and modern .NET in production environments
• Strong background in AWS serverless architecture (Lambda-first)
• Experience building distributed, event-driven systems
• Comfortable designing data models across SQL and NoSQL
• Able to work from high-level business problems to pragmatic technical solutions
• Confident communicator who can explain trade-offs to both technical and non-technical stakeholders
• Pragmatic and outcome-focused, values shipping, quality and maintainability over perfection

Nice to have:

• Exposure to AI-assisted/agentic development workflows
• Experience with OpenSearch or AppSync

Working model & contract details

• 6-month contract (extension likely)
• £900 per day, Outside IR35
• Fully remote within the UK
• Occasional office visits may be required on an ad-hoc basis