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 Reconciliation Squad, you’ll lead 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 proficient in at least one of the following languages: Golang or Python (experience with multiple 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!