Full Stack Engineer ( AI

Senior Full Stack Software Engineer React | Type Script | Python | AWS Belfast / Remote

• Senior-level full-stack role within a rapidly scaling US technology business
• Genuine end-to-end ownership across React, Type Script, Python and AWS
• Cloud-native, event-driven distributed systems operating at meaningful scale
• Fully remote, UK-based
• £80,000 to £100,000 plus a strong benefits package

About Our Client

Our client is a US technology business that has been growing its UK engineering function as the product scales. The team operates within a modern cloud-native architecture and the engineering culture is genuinely autonomous engineers are expected to understand the problems they are solving, make architectural decisions and take ownership of the software they build in production.

The Role

This is a genuine senior full-stack role, and that word matters here. The team is not looking for a backend engineer who occasionally touches the frontend, or a React specialist who makes small API changes. You will be expected to take a problem from initial product discussion and technical design through frontend, backend, cloud infrastructure, testing and production deployment.

You will work closely with product managers and designers within a highly autonomous environment, contributing to architectural decisions rather than consuming them. The core environment is React, Type Script, Python and AWS, alongside cloud-native, event-driven and distributed systems. The team is also actively exploring how AI-assisted development tools improve the way software is designed, built and maintained, which makes this an interesting opportunity for engineers who are already working this way and want an environment that actively encourages it.

Key Responsibilities

• Design, build and operate production software end to end, owning both frontend and backend from initial design through to deployment
• Build sophisticated React and Type Script applications with a strong focus on component architecture, state management, performance, maintainability and testing
• Design and build robust Python services and APIs, including event-driven, asynchronous and distributed systems
• Contribute to architectural decisions and be able to explain the reasoning behind them clearly, including trade-offs around scalability, reliability and data modelling
• Own the AWS infrastructure relevant to the applications you build, including containers, Kubernetes, serverless technologies, deployment strategies and cloud observability
• Work with product managers and designers from problem definition through to delivery, challenging assumptions and proposing well-reasoned technical solutions
• Write and maintain automated tests across unit, integration and end-to-end levels as an expected part of delivering production-grade software
• Use AI-assisted development tools to improve your own productivity while maintaining full ownership of code quality, security and engineering standards
• Participate actively in code review and technical discussion, constructively challenging decisions where a better approach exists
• Mentor less experienced engineers within the team

What You'll Need

Essential

• Substantial commercial experience delivering production software at senior level
• Strong, demonstrable experience with React and Type Script building complex applications rather than simple interfaces or internal tools
• Meaningful backend engineering experience, ideally with Python, including API design, service architecture, data modelling and asynchronous processing
• Working knowledge of AWS and modern cloud-native deployment, including an understanding of what happens to your software after you commit the code
• Experience with distributed systems, microservices, messaging or event-driven architecture
• A strong approach to automated testing and the ability to explain how that fits within a CI/CD environment
• The ability to talk in depth about projects where you have taken genuine technical ownership across both frontend and backend what problem you were solving, what decisions you made and why
• Based in the UK with the right to work here

Desirable

• Experience with technologies such as Kafka, Kinesis, PostgreSQL or DynamoDB
• Practic…