Senior Full Stack Engineer (AI)

Salary: £90,000 - 95,000 per year

Requirements:

• Strong commercial software engineering experience with C# and .NET.
• Full-stack development experience, ideally including Angular or another modern frontend technology.
• Experience developing modern cloud/SaaS applications.
• Strong understanding of software design, testing, architecture and engineering quality.
• Commercial experience using AI coding assistants and/or agentic development tools as part of real software delivery.
• Demonstrable experience beyond basic Copilot usage, including how AI has been incorporated into our development workflow.
• Confidence reviewing AI-generated solutions and knowing when to trust, challenge, correct or override the output.
• Comfortable writing clear specifications and prompts that both engineers and AI agents can work from.
• Strong engineering judgement and the confidence to challenge how something has been designed or implemented.
• Comfortable operating in an environment where AI engineering practices are evolving quickly.
• Collaborative approach with the ability to share knowledge and raise engineering practices across a team.

Responsibilities:

• Design and deliver end-to-end product features across a C#/.NET backend and modern frontend environment.
• Work closely with Product to define, refine and deliver the product roadmap.
• Use AI coding and agentic tools as part of our day-to-day software engineering and delivery.
• Help evolve how AI is incorporated across specifications, development, PRs, code reviews, testing and QA.
• Critically review AI-generated code for quality, correctness, security, maintainability and architectural fit.
• Help turn successful individual AI practices into repeatable approaches that benefit the wider engineering team.
• Write and maintain unit tests, test frameworks and automated test cases.
• Identify defects, performance bottlenecks and technical debt.
• Contribute to the continued development of AI functionality within our product.
• Work in an environment where the focus is increasingly moving from simply writing code towards specification, design, orchestration and engineering judgement.

Technologies:

• Agentic AI
• AI
• AI Agents
• Angular
• Backend
• C#
• Cloud
• Copilot
• Frontend
• Security
• ASP.NET
• LESS
• Fullstack

More:

We are an established InsurTech business and an engineering team working on a mature workflow automation platform used by 100+ clients. Our product already has AI capabilities in production, with a wider roadmap focused on expanding how AI is incorporated into both the product itself and the way our engineering team develops software. This is a permanent hybrid role based in Crawley, with two days per week in the office, and offers a salary of up to £95,000 plus bonus. We are looking for an experienced software engineer who wants to help shape what modern engineering looks like as agentic AI capabilities mature, bringing strong judgement and practical AI-driven development experience into an environment that is actively evolving.

last updated 32 week of 2026