Jobs / Bulgaria / SumUp Payments Limited
Senior Software Engineer (Golang)- Payments Experience
SumUp Payments Limited · 🌍 Sofia, Bulgaria
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Sponsor Radar — SumUp Payments Limited
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About the role
We believe in the everyday hero. Those who have the courage to follow their passion and who have the strength and determination to realise their dreams. Small business owners are at the heart of all we do, so we're creating powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America and the United States work together to ensure that small business owners can be successful doing what they love. About the team The Payments Experience team sits at the heart of how millions of small businesses receive their money. We build and maintain the backend services that power payout settings, payout instruments, and the tooling that keeps payments flowing reliably across 37 markets. Right now, the tam is working through a meaningful technical challenge: migrating legacy services off an ageing platform database while continuing to deliver new capabilities for merchants and internal teams. This is a great opportunity to join a small, focused squad where your contributions are visible, your code matters, and there's real space to grow your craft in a complex fintech domain. What you'll do: • Build and ship features within the Payments Experience domain, including payout instrument flexibility per market and tooling to manage SUBA availability for sales teams • Support the ongoing maintenance and operational health of the team's backend services, keeping them stable and reliable • Contribute to decommissioning a legacy Ruby service that manages payout settings in the Dashboard and SuperApp, including cleaning up dependencies for a smooth transition • Help remove Platform DB dependencies from the Bank Accounts service as part of a broader migration effort • Take part in planning and refinement sessions, sharing technical assessments and effort estimates with the team You'll be great for this role if you have: • Strong hands-on experience building applications in Go, with a solid grasp of core language concepts and the standard library. • Comfortable working within microservices architectures and implementing or consuming RESTful APIs. • Good knowledge of SQL databases, particularly PostgreSQL, and ability to write clean, efficient queries. • Familiarity with containerised deployments using Kubernetes and experience working with AWS. • Open to feedback, motivated to solve real engineering problems, and comfortable navigating multi-language codebases (the team works across Go and Ruby). Why you should join SumUp: • 🌍 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our modern Sofia office. This involves an office-first setup • 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced • 🚀 Enrolment in our Virtual Stock Option programme: you will own a stake in SumUp's future success • 📚 A dedicated annual L&D budget of €2000 for your individual development, which you can be used to attend conferences and/or advance your career through further education • 🏖 Generous time off: 25 days of paid leave, plus one extra day per year of service (up to 35) • 🏥 Peace of mind: comprehensive health and life insurance - includes dental coverage • 💪 Stay active: on-site yoga and a co-sponsored Multisport card offering access to hundreds of sports facilities • 🍽 Meal support: benefit from a tax-free food voucher program (100 EUR per month) plus flexibility via our Re:Benefits platform (40 EUR) • 🚌 Easy commute: free shuttle buses connecting directly to Joliot-Curie metro station • 👶 Family-friendly: new baby b