(Senior) Backend Engineer

SumUp empowers businesses to get paid effortlessly, process orders fast, sell online in minutes, and manage their money with confidence. We build the tools that help businesses, and their customer experiences, thrive.

As a key member of the Payments BR Tribe, you’ll help shape and deliver innovative products that make a real difference for our merchants in Brazil. You’ll join a global, autonomous, cross-functional team committed to turning bold ideas into seamless, high-impact solutions. Being part of the Payments team means working alongside driven, purpose-led people who take ownership, embrace challenges, and are passionate about helping businesses succeed.

As a Senior Backend Engineer within the tribe, you’ll support on the design and delivery of robust systems that ensure accuracy, transparency, and trust in our financial operations.

What You’ll Do

• Guide engineering decisions and mentor other developers.
• Design, implement, and maintain highly available backend services that process and reconcile transaction data at scale.
• Redesign and evolve architectural systems to support the transition toward a standalone reconciliation and reporting application for payment receivables.
• Collaborate with multiple squads and stakeholders to address urgent requests while protecting the squad’s long-term technical vision.
• Optimize database performance, improve test coverage, and ensure observability, resilience, and reliability across systems.
• Actively participate in architectural discussions within the Payments BR tribe.

You’ll be great for this role if you:

• Have strong software engineering expertise, including code design, quality attributes, automated testing, CI/CD, performance optimization, resilience patterns, and distributed systems.
• Are experienced with functional backend programming languages (experience with Golang is a plus).
• Have deep experience with relational databases (especially PostgreSQL) and are comfortable with schema modeling, query optimization, and database tuning.
• Worked with messaging queues (SQS, RabbitMQ) and stream processing platforms (Kafka).
• Are comfortable working with MongoDB and Redis.
• Are capable of producing clear, structured technical documentation.
• Thrive in ambiguous environments, are adaptable, and can balance long-term technical improvements with short-term high-priority demands.
• Have advanced English proficiency and can present and discuss technical topics effectively in public forums or cross-team settings.

Why you should join SumUp
🌍 Global Experience: Collaborate with a diverse team of 3,000+ people from over 90 countries, and join our global off-sites and hackathons.
🤝 Collaborative Culture: Join a team that values diversity, innovation, and teamwork, where your ideas and contributions truly matter.
📈 Career Growth: Be part of a global team working on large-scale fintech products used by millions of businesses.
💙 Great Benefits: Health plans, meal vouchers (VR), Zenklub, Wellhub, life insurance, childcare allowance, and more.
📚 Learning & Development: Access an annual budget of R$ 10,000 for education, certifications, and conferences.
🌴 Time Off: Enjoy 30 additional days off through our Break4Me program after 3 years at SumUp.
💸 Grow with Us: Participate in our virtual stock program and benefit from SumUp’s success with company shares.

Learn More About SumUp
🇧🇷 Office tour at São Paulo
💡 Ask me anything: Engineering at SumUp
🚀 SumUp’s Innovation Hackathon
🤝 Get to know our hiring process

Ready to Join us?
Apply now and help us shape the future of financial solutions for small businesses