Senior Lead - Staff Software Engineer
On Holding AG - London
Posted Feb 3, 2026
Benefits
- Parental leave
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- Non-birth-parent leave
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- Family-building benefits
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- Fertility benefits: Not verified
- Adoption assistance: Not verified
- Surrogacy assistance: Not verified
- Mental health support
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- Relocation assistance
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- Childcare support
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Schedule
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Application
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About this role
Senior Lead - Staff Software Engineer London Our Product R&D business is performing and growing strongly, which is why we are looking for a Staff Software Engineer with a strong focus on event-driven architectures to help scale On's business to the next level. As a key member of our engineering team, you will play a pivotal role in leading the development of data streaming for product data throughout its lifecycle. In addition to being hands-on, you will mentor team members, share your knowledge and expertise, and influence the technical direction of the organization. You will be based in London (or within commutable distance) and are willing to be in the office two days per week. You will collaborate closely with teams in Zurich, Berlin, Ho Chi Minh and London, and work with Technology and Product Development departments across On's global office locations. Your Mission - Drive the development of data streaming across our event-based architecture, using technologies such as Kafka and Node.js - Own technical knowledge across multiple domains, retaining architectural context while providing guidance on data streaming standards, governance, and best practices across the ensuring effective application of organizational data streaming standards, governance, and best practices within team codebases and projects - Be hands-on by writing and owning production code, setting a high quality bar through thoughtful PR reviews, debugging production issues, and continuously improving reliability, operability, and observability across data streaming pipelines - Act as a technical mentor to engineers across multiple teams on event-driven architecture, streaming patterns
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