{"id":"6bb9eb57-0180-4f7a-8375-49d123211814","slug":"johannes-schaback","name":"Johannes Schaback","bioBrief":"Co-founder and CTO of Stark Defence, a Berlin-based strike drone startup founded in 2024 that raised EUR500M led by Sequoia Capital and Founders Fund at a valuation above EUR3.5 billion in June 2026. A repeat founder who previously served as CTO of SumUp, a global payments technology company.","priorExits":null,"nationality":"German","verificationPosture":"verified","aliases":[],"sources":[{"url":"https://thenextweb.com/news/stark-defence-500-million-sequoia-founders-fund-3-5-billion-valuation","title":"Stark Defence raises EUR500M led by Sequoia and Founders Fund","sourceName":"The Next Web"},{"url":"https://en.wikipedia.org/wiki/STARK","label":"Wikipedia","title":"STARK"},{"url":"https://press.airstreet.com/p/stark-500m","label":"Air Street Press","title":"STARK raises EUR500M to build Europe's next defense prime"}],"reviewStatus":"reviewed","createdAt":"2026-08-07T00:44:30.501Z","updatedAt":"2026-08-07T05:10:02.585Z","educations":[],"companyRoles":[{"id":"8b125121-c180-4d3c-94ca-e94074521ffa","personId":"6bb9eb57-0180-4f7a-8375-49d123211814","companyId":"f4c2b03c-e455-446f-8988-0af6da951780","role":"founder","roleTitle":"Co-founder and CTO","startDate":null,"endDate":null,"currentRole":true,"roleBasis":"verified_secondary","createdAt":"2026-08-07T00:44:31.274Z","company":{"slug":"stark-defence","name":"Stark Defence"}}],"boardRoles":[],"investorRoles":[],"foundings":[{"id":"9d5fa05a-73ae-44e3-b7a3-b90ed609ce37","personId":"6bb9eb57-0180-4f7a-8375-49d123211814","companyId":"f4c2b03c-e455-446f-8988-0af6da951780","foundingDate":null,"cofounderStatus":"cofounder","stillAtCompany":true,"createdAt":"2026-08-07T05:10:04.298Z","company":{"slug":"stark-defence","name":"Stark Defence"}}]}