Senior Backend Engineer

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About the role

Senior Backend Engineer – Global Bank tribe 📍 Florianópolis, Brazil At SumUp, we believe small merchants are the heartbeat of our communities. By joining the Global Bank tribe, you'll help shape the card infrastructure that directly powers how millions of merchants access, manage, and grow their finances in Brazil and beyond. As a Senior Backend Engineer, you will play a central role in evolving our card domain — from credit card launches and digital wallet integrations to regulatory compliance and cross-market scalability. This is a role for engineers who want their work to matter and who thrive at the intersection of technical excellence and real-world impact. What you'll do • Shape the card domain globally: Take ownership of complex backend features across the card lifecycle, delivering production-ready code that scales across Brazil, Chile, and Europe. • Boost reliability: Introduce and improve monitoring, alerting, and runbook practices, actively support incident handling, and contribute to incident reviews with follow-up improvements that stick. • Drive technical growth: Define reusable architecture patterns, lead service refactoring, and reduce technical debt across 12+ service orchestrations in the Latam card domain. • Lead & mentor: Act as a technical reference for junior and mid-level engineers, facilitate design discussions, and author RFC sections that push the team's engineering standards forward. • Collaborate broadly: Partner with Product Managers, Designers, and cross-functional squads to shape roadmaps, influence technical strategy, and deliver compliant, merchant-facing products. What makes you a great fit • Ability to take complex, ambiguous product problems and define clear, scalable technical approaches. • Strong expertise in unit and integration testing, with a focus on writing reliable, maintainable backend code in production environments. • Proficiency in backend development, with experience in Java, Kotlin or a genuine drive to master it quickly. • Hands-on experience with AWS Cloud services and relational databases. • Able to collaborate effectively across teams and communicate complex ideas in a clear, adaptable way — including with non-technical stakeholders. • Advanced written and spoken English proficiency. Why you should join SumUp 📈 Career growth: Be part of a global team working on large-scale fintech products used by millions of businesses across 37 markets. 📚 Learning & development: Access an annual budget of R$ 10,000 for education, certifications, and conferences. 🌍 Global experience: Collaborate with a diverse team of 3,000+ people from over 90 countries, and join our global off-sites and hackathons. 🌴 Time off: Enjoy 30 additional days off through our Break4Me programme after 3 years at SumUp, plus 22 working days of paid leave and public holidays. 💸 Grow with us: Participate in our virtual stock option programme and benefit from SumUp's success with company shares. 💙 Great benefits: Health plans, meal vouchers (Pluxee), Zenklub for mental well-being, Wellhub gym membership, life insurance, childcare allowance, and private retirement contributions via Santander. 🔗 Referral bonus: Earn additional rewards by referring talented people to join the SumUp team. Learn more about SumUp 🏙️ Office tour – São Paulo 🚀 SumUp's Innovation Hackathon 🤝 Get to know our hiring process About SumUp Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse t

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