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Backend Engineer

  • Berlin, Germany
  • Full time
  • Competitive
  • 3rd September 2025
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Full Description

In short

Our Direct to Consumer business is performing and growing strongly, which is why we - within the Customer Platform team in Commercial Technology at On - are looking for a Backend Engineer to scale On’s online business to the next level. Our newly created team is focussed on providing a customer communication platform product. As an experienced engineer, you will be responsible to design, build, deploy, test and operate our digital services. You will be sitting in our office in Berlin and collaborating closely with the cross-functional Digital teams in both locations.

The Backend Engineer role will report to Senior Lead - Engineering Manager on the Customer platform team within Commerce Technology supporting teams within Commerce Technology.

Your Mission

  • You will build and maintain the Customer platform by providing APIs, real-time events and documentation to reduce the cognitive load and enable stream-aligned teams to rapidly deliver premium, personalized experiences across all consumer touch points.
  • You iteratively deliver value and quality with your solutions to meet both technical and internal consumer needs.
  • With the team, you will build, release and operate complex systems. You will own and evolve the architecture (by leading decision making through RFCs) that scales for millions of customers across the globe.
  • You will act as an expert in the given technology area, leverage best in class engineering practices including continuous integration and deployment, code reviews, high test coverage and allowing for observability.
  • You collaborate effectively through verbal and written communication with diverse teams and stakeholders and drive alignment beyond the team.
  • You will engage in the engineering community by sharing knowledge, mentoring your team mates, receiving / providing feedback or growing our team by supporting the hiring.

Your story

  • You have 5-6 years of backend experience designing, building, testing, releasing and operating scalable systems with a strong problem-solving mindset striving for excellence and taking full accountability.
  • You have experience within the Ruby and NodeJS (TypeScript) eco-system, designing and developing APIs (bonus if you have experience with GraphQL and NestJS).
  • You have experience working with and designing distributed systems. You are competent in building and designing event driven systems (e.g. using Kafka).
  • You have mastered automated testing, TDD, and performance debugging tools and you are hands-on with operating the infrastructure on AWS or GCP.
  • You are comfortable using containerized workloads and clusters like Kubernetes.
  • You facilitate discussion as well as guide and mentor your peers by delivering praise and constructive feedback.
  • You have a product mindset that makes you comfortable in owning and building features from the ground up, understanding the “why”, applying holistic thinking and delivering for impact using experimentation.

Attributes of a successful candidate:

  • Action-Oriented: Proactively taking on new opportunities with high energy and a sense of urgency.
  • Team-focussed: Build strong partnerships in the team and beyond to meet shared objectives
  • Alignment-driving: Drive alignment on topics inside the team by providing clear context, contributing to the planning of focus areas in the team and sharing updates proactively
  • Manage Ambiguity: Operating effectively when things are not certain and help to bring clarity to the team. Viewing challenges as opportunities to grow and learn
  • Self-Development: Seek new ways to grow and challenge your abilities both personally and professionally using feedback and reflection to gain insight into personal strengths and weaknesses

What to expect

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.

  • Step One

    It starts with you...

    You'll start by submitting your application to a specific role. We try to keep this step as simple as possible. We do get a lot of applications, but we review them all. We ask that you allow around 14 days for us to come back to you with a response. If you are a good fit to the role, someone will follow up with you within that window. If you didn't receive a reply, or were unsuccessful this time around, we encourage you to look for other possible matches at On.

  • Step Two

    Interview with a recruiter

    What ignites your spirit? This is where we’ll start getting to know all about you and what makes you tick – and it’s your first chance to get a feel for our culture. Chatting with a member of our talent team, you’ll learn more about On and how we work. We’ll learn about what motivates you and what you could bring to the team.

  • Step Three

    Interview with a hiring manager

    Ready to dig into the details? This second interview will be held with your future manager and will focus on the specifics of the job. Together you’ll delve into your unique skills and experiences and how they could be relevant at On. It's also a time to assess how you might feel working side-by-side. Bring any questions you have about the job, the team or anything else you might like to know – this is an open forum.

  • Step Four

    The Case Study

    What's your style? This task will help us understand how you think, face a challenge and give insight into your novel ideas. Designed to give everyone their best shot, your case study is based on something you might typically experience on the job. This is your chance to show us what you’ve got. So express yourself. Be you.

  • Step Five

    The Experience Day

    Your first taste of the Oniverse. This is a time to meet some of the people you'll be working closest with. In person or virtually, you'll get a feel for the day-to-day at On and the people who make it happen. You'll chat with a few potential teammates - the conversations will be as equally driven by the role and your experience as by our values. We believe how you do things is just as important as what you do.

  • Step Six

    The Result

    Are we a good fit? We’ll get together internally to share our feedback and decide if we’re a match. We know that job searching is a big time investment, so it’s not a decision we take lightly. It’s also time for you to reflect on the experience – are we the right place for you? No matter the outcome, we’ll give you meaningful feedback.

Step One:

It starts with you...

You'll start by submitting your application to a specific role.

We try to keep this step as simple as possible. We do get a lot of applications, but we review them all. We ask that you allow around 14 days for us to come back to you with a response. If you are a good fit to the role, someone will follow up with you within that window. If you didn't receive a reply, or were unsuccessful this time around, we encourage you to look for other possible matches at On.

The organisation

On
  • Sporting Goods & Apparel
  • Zurich, Switzerland
  • 2000+ employees
  • Website

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