Software Engineer, Backend Focused

<h1><strong>Software Engineer (Backend; Wholesale)</strong></h1> <h2><strong>In short</strong></h2> <p>On’s Wholesale business operates at a significant global scale. In 2025, it generated CHF 1.75 billion in net sales, representing 58.2% of On’s total revenue.</p> <p>Our Wholesale technology teams build and evolve the systems that support On’s B2B business, including commerce, sell-in, merchandising and sales-enablement capabilities.</p> <p>We are looking for a Backend Engineer who wants to understand the problems we are solving, not just implement requirements. You will work closely with engineers, Product and business stakeholders to build reliable systems, shape solutions and continuously improve how we deliver software.</p> <h2><strong>Your Mission</strong></h2> <h3><strong>Build the right solutions</strong></h3> <ul> <li>Understand the customer and business problems behind the work, and help shape solutions and delivery plans based on user value, data and technical context.</li> <li>Lead solution design for complex problems, breaking them down into manageable pieces and driving consequential technical decisions within the team.</li> <li>Use data, customer insights and technical context to challenge assumptions and help make good product and engineering decisions.</li> <li>Work closely with frontend, mobile and Product to deliver end-to-end outcomes rather than isolated backend components.</li> </ul> <h3><strong>Own what you build</strong></h3> <ul> <li>Design, build and operate reliable and scalable backend services using Node.js, TypeScript, NestJS, Postgres, REST APIs, GraphQL, and streaming platforms.</li> <li>Take ownership from design through rollout and production, including testing, monitoring, operational risks and resolving issues when they occur.</li> <li>Drive pragmatic technical decisions with the team, balancing user value, delivery speed, quality and long-term maintainability.</li> <li>Proactively identify problems, dependencies and risks, and work to unblock yourself and the team rather than waiting for direction.</li> </ul> <h3><strong>Improve how we engineer</strong></h3> <ul> <li>Improve the team's systems and ways of working by removing recurring friction, unnecessary complexity and manual work, and improving developer productivity.</li> <li>Raise the team's engineering standards through design discussions, code reviews, mentoring and knowledge sharing.</li> <li>Work with distributed systems and cloud-native infrastructure on GCP, Kubernetes and Docker.</li> <li>Constructively challenge existing solutions and ways of working when you see a better approach.</li> </