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 to minimize downtime and improve 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., 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).

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.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Engineering and Information Technology

Industry

Retail

Location

Berlin, Germany

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