Full Stack Developer jobs in United Kingdom

We are a fast-growing fintech company building modern, scalable platforms that power real-world financial products. Our engineering culture values clean architecture, strong ownership, and pragmatic innovation. We operate in a cloud-native, microservices environment and invest heavily in frontend quality, design systems, and developer experience.

As a Lead Fullstack Engineer, you will play a key technical leadership role across frontend and backend systems. You’ll help shape architecture decisions, lead by example in code, and work closely with product, design, and other engineers to deliver high-quality, scalable solutions.

This role is hands-on and ideal for someone who enjoys building modern web applications while mentoring engineers and influencing technical direction.

• Lead the design and development of fullstack solutions in a microservices architecture
• Drive frontend excellence, including component design, design systems, and web standards
• Architect, build, and maintain scalable backend services
• Collaborate with product managers and designers to translate requirements into technical solutions
• Guide best practices around code quality, testing, performance, and security
• Mentor and support engineers through code reviews, pairing, and technical guidance
• Contribute to cloud and platform decisions, including deployment and observability

• Svelte (primary), with openness to React or Angular experience
• Strong focus on web components and reusable design systems
• Modern JavaScript / TypeScript

• Node.js or Python (microservices-based)
• API-driven architecture
• Infrastructure & Cloud:
• Kubernetes
• AWS
• Containerized, cloud-native deployments
• Data:
• SQL databases

• Strong experience as a senior or lead fullstack engineer in modern web environments
• Deep knowledge of JavaScript and frontend architecture
• Experience with Svelte, React, or Angular (Svelte experience is a plus, not a requirement)
• Backend experience with Node.js and/or Python
• Solid understanding of microservices architecture
• Hands-on experience with Kubernetes and AWS
• Strong SQL skills and experience designing data models
• Proven ability to lead technically and mentor other engineers
• Comfortable working in a fast-paced fintech or product-driven environment

• Experience building or maintaining design systems
• Exposure to web components standards
• FinTech, payments, or regulated-industry experience
• CI/CD and DevOps best practices

• Opportunity to lead and shape core technical systems
• Modern tech stack with real architectural ownership
• Collaborative, product-focused engineering culture
• Competitive compensation and benefits
• Flexible working arrangements