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Senior Backend Engineer - Global Banking Solutions

SumUpSofia, Bulgaria
On-site Full-time

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Experience Level

Senior

Qualifications

Key Responsibilities: Design, develop, and enhance SumUp’s core banking services that facilitate ledger operations and transactions, transforming our regional systems into a cohesive, scalable global platform. Address intricate challenges related to distributed systems, ensuring resilient services that maintain high performance under substantial transaction loads. Drive modernization efforts by enhancing observability, increasing test coverage, refactoring code for long-term sustainability, and introducing new architectural patterns without disrupting live banking operations. Participate in critical architectural decisions—building ledger and transaction history systems from the ground up to ensure scalable global banking solutions for our clients. Collaborate closely with teams from Risk, Treasury, Finance, and Infrastructure to maintain smooth, compliant, and reliable global operations. Take ownership of projects from design through to production, managing the services you develop, monitoring their performance, and continuously enhancing our software delivery processes.

About the job

At SumUp, we celebrate the everyday heroes who possess the courage to pursue their passions and the determination to turn their dreams into reality.

Our mission revolves around empowering small business owners with innovative, user-friendly financial solutions that simplify the management of their enterprises. With a founder's mentality and a 'team-first' attitude, our diverse teams across Europe, South America, and the United States collaborate to ensure that these entrepreneurs can thrive in their endeavors.

The Global Bank team at SumUp is responsible for developing the foundational infrastructure and services that provide merchants with digital bank accounts, enabling them to manage their finances efficiently and reliably.

Within this team, the Balance Management Squad is pivotal. We are currently nearing a significant milestone: the consolidation and modernization of our balance management system in Europe. Our next ambitious project is to establish a global transaction history service—a unified platform that offers merchants consistent and transparent insights into their financial activities across all regions.

As a Backend Engineer, you will play a crucial role in modernizing existing systems while balancing innovation and stability. You will collaborate with teams across various regions to build reliable services that can navigate diverse markets with unique regulatory requirements.

If you are passionate about solving complex problems in high-load systems, have a curiosity for banking, and are eager to join a team that embraces challenges, we would love to connect with you.

About SumUp

SumUp is dedicated to empowering small business owners by providing innovative financial solutions that are intuitive and effective. Our diverse teams, operating across multiple continents, are committed to creating a supportive environment where entrepreneurs can flourish.

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