Senior Site Reliability Engineer

In the dynamic landscape of On, the tech thrives much like a spirited runner: always moving, always improving. We are building technology that continues to supercharge the growth of On, helping to ignite the human spirit through movement. We’re seeking a Site Reliability Engineer to ensure our digital platforms deliver exceptional performance, reliability, and scalability to support our global customer base.

As a Site Reliability Engineer (SRE) at On, you will play an important role in building and maintaining our cloud infrastructure to support our e-commerce platforms, customer‑facing applications, and internal systems. You will work closely with engineering teams to improve reliability, optimize performance, and implement automation solutions.

Your Mission

• System Reliability & Performance: Contribute to high availability (99.99%+ uptime), scalability, and performance of On’s digital platforms through proactive optimization and robust infrastructure design.
• Infrastructure Development: Build and maintain cloud‑based infrastructure using Infrastructure‑as‑Code (IaC) tools.
• Automation: Develop and implement automation solutions to streamline deployments, reduce toil, and enhance monitoring.
• Incident Response: Lead incident resolution, perform troubleshooting, and root cause analyses towards minimizing downtime and improving system resilience.
• Monitoring & Observability: Improve and maintain monitoring, logging, and alerting solutions to ensure proactive issue detection and resolution.
• Collaboration: Partner with the SRE team and software engineers to identify opportunities, develop, and roll out major features.
• Compliance & Security: Integrate security best practices into our systems and solutions.

Your story

• Experience in site reliability engineering with a track record of managing complex, high‑traffic systems.
• Expertise in cloud platforms (GCP, AWS) and container orchestration (Kubernetes, GKE).
• Proficiency in scripting and programming (e.g. in Python, Go) for automation and tooling.
• Experience with CI/CD pipelines (ArgoCD, GitHub Actions) and IaC (Terraform).
• Solid understanding of networking, load balancing, and DNS management.
• Experience with observability and monitoring for cloud native environments.
• Strong analytical skills with a proactive approach to resolving complex technical challenges.
• Excellent communication skills, with the ability to explain technical concepts to diverse stakeholders.

Nice to Have:

• Background with e‑commerce platforms or high‑traffic consumer applications.
• Experience in platform engineering, dedicated to building solutions that enhance developer experience (DevEx) and boost software development efficiency.
• Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent experience).

About the Team

You will join a skilled and dynamic team of cloud & site reliability engineers dedicated to transforming On’s technological foundation. We are crafting scalable, resilient cloud solutions to power internal operations, enhance product performance, and support On’s growth. As a key member of our team, you will shape our cloud infrastructure strategy, ensuring robust, efficient, and sustainable systems that drive innovation. Join us in Berlin, to make a lasting impact on On’s digital future!

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

What we offer

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.

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. If you’re a good fit to the role, a recruiter will follow up with you directly. 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.

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