On Senior Lead - Staff Site Reliability Engineer

Company: On

Location: London

Posted: April 17th, 2026

At On, we believe technology should move as fast as a runner. We are building the foundation that allows our engineering organization to scale, innovate, and deliver value without friction. We are looking for a Staff Software Engineer to join the Developer Experience (DevEx) team. In this hands-on IC role, you will build the platform that empowers dozens of technology teams to build, ship, and operate services effortlessly. You will be the architect and primary builder of our "Golden Path," ensuring that speed, safety, and reliability are baked into every developer's workflow.

Your Mission

Your Story

Meet The Team

The Developer Experience team serves as the bridge between infrastructure and product. We don't just measure "uptime"; we measure "time to value." As a Staff Engineer on this team, you will be at the heart of our engineering culture, defining the standard for how software is built and delivered at On.

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.

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