Full Stack Software Engineer

About the role

FELFEL, a family business founded in 2013 that provides smart fridges and barista coffee to around 1,000 Swiss workplaces, is hiring a Full Stack Software Engineer (100%) in Zurich. You will build systems that connect warehouse automation, smart fridges and customer-facing applications, working closely with warehouse and operations staff.

Key responsibilities

• Own the warehouse and supplier web apps used daily for inbound processing, picking, labeling and inventory.
• Develop and maintain the internal back-office tool, including its backend and GraphQL API for menus, deliveries, inventory and customer sites.
• Manage the service linking automated picking lanes to the rest of the system.
• Maintain and update the Point of Sale Android app on hundreds of fridges, including its release process.
• Integrate and support payment systems (Card, TWINT), the ERP and partner integrations.
• Take part in the on-call rotation to debug live issues with the operations team.
• Visit the warehouse on site to test changes and gather user feedback.
• Translate vague problems from non-technical colleagues into shipped solutions.
• Own production deployments, manage logs and alerts, and plan rollouts with rollback options.
• Break down large features, review other engineers' pull requests and keep the system healthy through upgrades, testing and cleanup.

Required profile

• Proven production experience in at least one typed backend language (C#, Java, Kotlin, Go or TypeScript) and one modern frontend framework.
• Track record of owning software in production, including on-call duties and debugging from logs.
• Willingness to dive into C#, TypeScript, Android and Kotlin; familiarity with hardware, IoT, edge devices, payments, logistics, retail or Odoo is highly advantageous.
• Ability to learn quickly in unfamiliar tech stacks and ship reliable code.
• Strong interest in working directly with end users, fluent English (German or French is a plus).
• Valid work permit or Swiss passport; non-smoker.

What we offer

• Food and coffee available at the workplace.
• 5 weeks of holiday per year, plus the option to buy an extra week.
• Two full weeks of work from anywhere per year.
• Above-mandatory pension fund and 16 or 3 weeks of fully paid parental leave, with childcare support.
• Covered half-fare travelcard, team events and weekly sports sessions.