Lead FullStack Engineer – POS Platforms

LOCATION: BERLIN

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.

• 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, payment, and inventory systems Build secure, observable services that handle real-time and asynchronous data exchange Work with mobile-first and PWA design principles to support a variety of in-store form factors
• Platform Architecture & Resilience: Help shape the architecture of On's POS platforms with a focus on flexibility, scale, and high availability Contribute to platform observability and monitoring using industry-standard tooling Implement robust testing across unit, integration, and end-to-end layers—automating quality at every stage Cross-functional Collaboration: Work closely with product stakeholders to bring ideas to life Influence technical decisions during vendor evaluations and rollout phases Impact roadmap decisions by sharing technical insights and platform implications Participate in agile rituals, code reviews, and engineering best practices

• 5+ years of full-stack development experience in high-performance, customer- or employee-facing applications
• Deep expertise in React, TypeScript, and modern JavaScript (ES6+)
• Proficient backend development skills— preferred, but open to equivalent modern stacks
• Strong understanding of REST and GraphQL APIs, including authentication, caching, pagination, and error handling
• Experience designing and building retail or commerce workflows such as checkout, loyalty, or order sync
• Familiarity with headless commerce, microservices, and composable architectures
• Solid understanding of testing methodologies: unit, integration, component, contract, and end-to-end
• Hands-on experience with CI/CD pipelines, Git workflows, and Agile methodologies
• Comfortable working in a fast-paced, evolving environment with cross-disciplinary teams

At On, we don't just create tools—we craft experiences that move the world. As part of our Retail Experience team, you'll help build the future of in-store technology. Your code will connect people with performance, power a seamless omnichannel journey, and support a mission that's bigger than any one screen: to ignite the human spirit through movement. Ready to help us redefine retail? Lace up. Let's go.

In a former 19th Century postal building by Berlin's river Spree, you'll find our future-focused, creative hub.

Köpenicker Str. 122,

10179

Germany

HEAD OF OPERATIONS PROJECT PORTFOLIO MANAGEMENT

My journey has evolved for sure and, actually, change can lead to infinite possibilities. Those core values that were there when I joined are still here today and I really find them extraordinary every day.

DIRECTOR OF ENGINEERING

We're closely connected to the whole business. Every day, we're making quick decisions to improve the customer experience. Because these live changes impact the whole business, we deeply respect individual opinion and what others think about the end customer experience.

HEAD OF OPERATIONS PROJECT PORTFOLIO MANAGEMENT

My journey has evolved for sure and, actually, change can lead to infinite possibilities. Those core values that were there when I joined are still here today and I really find them extraordinary every day.

DIRECTOR OF ENGINEERING

We're closely connected to the whole business. Every day, we're making quick decisions to improve the customer experience. Because these live changes impact the whole business, we deeply respect individual opinion and what others think about the end customer experience.

HEAD OF OPERATIONS PROJECT PORTFOLIO MANAGEMENT

My journey has evolved for sure and, actually, change can lead to infinite possibilities. Those core values that were there when I joined are still here today and I really find them extraordinary every day.

DIRECTOR OF ENGINEERING

We're closely connected to the whole business. Every day, we're making quick decisions to improve the customer experience. Because these live changes impact the whole business, we deeply respect individual opinion and what others think about the end customer experience.

On is a place that is centered around growth and progress. We offer an environment designed to give people the tools to develop holistically – to stay active, to learn, explore and innovate. Our distinctive approach combines a supportive, team-oriented atmosphere, with access to personal self-care for both physical and mental well-being, so each person is led by purpose.

On is an Equal Opportunity Employer. We are committed to creating a work environment that is fair and inclusive, where all decisions related to recruitment, advancement, and retention are free of discrimination.

Build the better you

We want to set everyone up for success, so here's the lowdown on how we hire. Our process is a two-way street – bringing you into our culture, while helping us learn how you think.

Our full process can last about eight weeks from application to offer, because we care about getting it right. These steps explain how we usually do things.

Before you get started, feel free to consider if you want to work with us. Strange question? Well, we give people a lot of space to navigate their day-to-day and that style isn't for everyone. We want you to be passionate about what you do and be sure this is the right fit. Because when skills and passion combine – it creates that 'Wow' moment.