Senior Backend Engineer (Golang) - Bank Balance

<p>At SumUp, the <strong>Global Bank team </strong>builds the core infrastructure and services that give merchants a digital bank account, helping small businesses manage their money easily and reliably. </p> <p>The <strong>Balance Management Squad</strong> sits at the core of the <strong>Global Bank </strong>Platform. Right now, our team is completing a major milestone: consolidating and modernizing our balance management system in Europe. The next big step is creating a global transaction history service; a single, shared platform used by all regions to give merchants consistent and transparent views of their financial activity.</p> <p>As a <strong>Senior</strong> <strong>Backend Engineer</strong>, you’ll help modernize existing systems while balancing innovation with stability, collaborate with teams across regions, and build reliable services that manage diverse markets with different regulations.</p> <p>If you enjoy solving complex problems on high-load systems, are curious about banking, and are looking for a team that tackles challenges head-on, we’d love to hear from you.</p> <p><strong>What You’ll Do</strong></p> <ul> <li>Build and evolve the SumUp’s core banking services that powers ledger operations and transactions, transforming our regional systems into a unified, scalable global platform.</li> <li>Tackle complex distributed systems challenges, ensuring resilient services that continue to perform under high transaction volumes.</li> <li>Support modernization initiatives by improving observability, adding test coverage, refactoring code for long-term maintainability, and gradually introducing new architectural patterns without disrupting live banking operations.</li> <li>Contribute to key architectural decisions - build ledger and transaction history systems f