Sebastian Zappe is a seasoned technology leader and CTO based in Berlin with 13+ years building accessible, data-driven products like Wheelmap.org and A11yJSON while steering SOZIALHELDEN’s technical strategy. He combines hands-on engineering across mobile, web, embedded hardware and cloud-native stacks (Kubernetes, Argo, CI/CD) with practical architecture and DevOps consulting to accelerate teams and deliver award-winning apps. A pragmatic advocate for accessibility, linked data and open mapping, he brings diplomacy to open-data policymaking and city-scale digital inclusion projects. Known for marrying UX-led, test-driven development with long-term sustainable project practices, he also advises startups and public transit policymakers on inclusive navigation and indoor mapping.
14 years of coding experience
8 years of employment as a software developer
Informatik / Computer Science, Informatik / Computer Science at Universität Potsdam / University of Potsdam
A11yJSON: A standard to describe the accessibility of the physical world.
Contributions:356 commits, 47 PRs, 1151 pushes in 5 years 2 months
accessibilitya11ygisbimdata-schema
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