The opportunity
SumUp gives small businesses the tools they need to get paid, manage their money, and grow - today, over 4 million merchants across 37 markets worldwide rely on SumUp to do exactly that.
What you'll do
Build and own features end-to-end across our web banking surfaces: from scoping and component implementation through testing, observability, and production maintenance
Work across the full stack: including defining API contracts, working with backend proxies, and integrating with the services that power our banking platform
Contribute to modernisation efforts, including architectural improvements,: component refactoring, and stack migrations that reduce technical debt and accelerate future delivery
Review peers' pull requests with attention to UI consistency, accessibility, and frontend best practices
Participate in production support and incident reviews, helping to strengthen: the squad's operational resilience across its web domain
Strong experience with React, TypeScript, with a track record of delivering: production-ready features end-to-end -not just isolated UI components
What they're looking for
- Genuine full-stack capability: Experience defining API contracts, working with backend proxies, and owning integrations, not just consuming them; backend experience in Node, Kotlin, Java, or Golang is valued
- Solid understanding of frontend architecture, component design patterns,: state management, and how frontend applications connect to backend services
- Experience writing and maintaining frontend tests (unit, integration,: snapshot, end-to-end) and a genuine care for code quality and reliability
- Comfort navigating a complex, multi-stack codebase. React and TypeScript are: core to this role, while our broader ecosystem also includes Node.js, Kotlin, Java, Go, Angular, AWS and Kafka. Prior experience with all of these is not required, but familiarity with most of them is a plus
