Senior Backend Engineer (Kotlin) - Cards is open at SumUp in Sofia, Bulgaria. Posted on Oct 9, 2026, and still on SumUp’s careers page when we last checked, on Nov 14, 2026.
About the role
Own and drive the end-to-end delivery of backend services within the Cards EU domain, including observability, testing, and production support Lead architectural discussions and shape the technical roadmap by proposing solutions for complex, distributed systems challenges Partner with engineers in adjacent squads and the product manager to shape and refine the squad backlog Mentor engineers through code and design…
The opening lines of the posting. The rest is on SumUp’s careers page.
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