Lead FullStack Engineer – POS Platforms in London

In short
At On, technology is more than just support—it\’s a catalyst for movement. As we expand our global retail footprint, we\’re reimagining the Point of Sale experience to be as premium, customer-centric, and innovation-driven as our brand. We\’re seeking a Full-Stack Engineer to help power the next generation of POS platforms—solutions that enable frictionless checkout, real-time inventory, omnichannel excellence, and seamless integration across our digital and physical retail ecosystems. Based in Berlin, you\’ll be a core contributor on the Retail Experience team, building modern interfaces and performant backends that bring our retail vision to life. This is a hands-on engineering role with broad technical ownership—spanning frontend (React/TypeScript), backend or equivalent), and API orchestration. If you\’re excited by streaming platforms, composable commerce, and building experiences that directly impact athletes and customers around the globe, let\’s move together.

Your mission

• POS Frontend & Backend Development: Build intuitive, fast, and resilient user interfaces using React, TypeScript, and modern frontend tooling Develop scalable backend logic or equivalent) to support retail data flows, system integrations, and business rules
• Systems Integration & API Engineering: Integrate with REST and GraphQL APIs across commerce, ERP,