(Senior) Backend Engineer

<div data-testid="markdown-response"> <div> <p id="message">At <strong>SumUp</strong>, we believe small merchants are the heartbeat of our communities. By joining the <strong>Payments BR Tribe</strong>, you'll help shape solutions that directly solve merchants' everyday challenges and redefine how financial products empower entrepreneurship in Brazil. The tribe is deeply focused on the Brazilian market — understanding the real needs and behaviours of our merchants and building products that truly fit their world. You'll be part of a global, autonomous, cross-functional team of driven, purpose-led people who take ownership, embrace challenges, and care deeply about helping businesses succeed.</p> </div> </div> <div data-testid="markdown-response"> <div> <p id="message">As a <strong>(Senior)</strong> <strong>Backend Engineer</strong>, you'll be the technical anchor of a small, high-impact squad — bringing clarity to complex integration logic, setting the architectural direction, and helping a growing engineer reach their potential. This is a role for someone who finds satisfaction in making hard systems reliable, loves writing clean Go code, and isn't afraid to navigate the complexity that comes with building at scale in a fast-growing market.</p> <hr></div> </div> <div data-testid="markdown-response"> <div> <h2>What you'll do</h2> </div> </div> <div data-testid="markdown-response"> <div> <ul> <li><strong>Own the architecture:</strong> Design and author RFCs that shape how the domain evolves, driving clean, scalable solutions across our integration layer with internal SumUp services and third-party services as well.</li> <li><strong>Write and review high-quality code:</strong> Take full ownership of backend delivery — from writing production-grade code to leading rigorous peer reviews that keep the codebase healthy and maintainable</li> <li><strong>Drive technical standards:</strong> Establish clear documentation, testing practices, and CI/CD improvements that reduce technical debt and make the squad more autonomous over time</li> <li><strong>Mentor and grow the team:</strong> Pair-program with and actively develop other engineers on the squad, acting as the technical reference point and fostering a culture of ownership and engineering excellence</li> <li><strong>Collaborate broadly:</strong> Partner closely with the Engineering Manager, Product Manager, and cross-functional stakeholders to translate business needs into clear technical roadmaps and scalable solutions</li> </ul> </div> </div> <div data-testid="markdown-response"> <h2>What makes you a great fit</h2> </div> <div data-testid="markdown-response"> <ul> <li>Solid backend development skills, with experience in Go, or strong experience in functional backend programming languages with a genuine drive to master Go quickly</li> <li>Strong expertise in code design, automated testing, CI/CD, performance optimisation, and building resilient, well-architected systems</li> <li>A track record of leading technical projects end to end — from writing design documents to shipping production improvements that hold up at scale</li> <li>Hands-on experience with AWS Cloud services and strong SQL optimisation skills with relational databases</li> <li>Have advanced English proficiency, with the ability to present and discuss technical topics clearly across teams and with non-technical stakeholders</li> <li>Experience contributing to technical strategy beyond the immediate squad</li> </ul> </div> <div data-testid="markdown-response"> <div><hr> <p><strong>Why you should join SumUp<br></strong><strong>🌍 Global Experience</strong>: Collaborate with a diverse team of 3,000+ people from over 90 countries, and join our global off-sites and hackathons.</p> <p>🤝 <strong>Collaborative Culture:</strong> Join a team that values diversity, innovation, and teamwork, where your ideas and contributions truly matter.</p> <p><strong>📈 Career Growth</strong>: Be part of a global team working on large-scale fintech products used by millions of businesses.</p> <p><strong>💙 Great Benefits</strong>: Health plans, meal vouchers (VR), Zenklub, Wellhub, life insurance, childcare allowance, and more.</p> <p><strong>📚 Learning &amp; Development</strong>: Access an annual budget of&nbsp;<strong>R$ 10,000</strong> for education, certifications, and conferences.</p> <p><strong>🌴 Time Off</strong>: Enjoy&nbsp;<strong>30 additional days off&nbsp;</strong>through our&nbsp;<strong>Break4Me</strong> program after 3 years at SumUp.</p> <p><strong>💸 Grow with Us: </strong>Participate in our virtual stock program and benefit from SumUp’s success with company shares.</p> <p><br><strong>Learn More About SumUp<br></strong><strong>🇧🇷&nbsp;</strong><a href="https://www.youtube.com/watch?v=8LwAYCUtfXQ" target="_blank"><strong>Office tour at São Paulo&nbsp; </strong></a></p> <p><strong>💡&nbsp;</strong><a href="https://www.youtube.com/watch?v=7m8wlYCwlO4" target="_blank"><strong>Ask me anything: Engineering at SumUp</strong></a></p> <p><strong>🚀 </strong><a href="https://www.linkedin.com/posts/sumup_insidesumup-innovation-hackathon-activity-7245403147458752513-0PD7?utm_source=share&amp;utm_medium=member_desktop" target="_blank"><strong>SumUp’s Innovation Hackathon</strong></a></p> <p><strong>🤝 </strong><a href="https://www.sumup.com/careers/how-we-hire/" target="_blank"><strong>Get to know our hiring process</strong></a></p> <p><strong>Ready to Join us?<br></strong>Apply now and help us shape the future of financial solutions for small businesses</p> <p>&nbsp;</p> </div> </div><div class="content-conclusion"><p><strong>Job Application Tip</strong></p> <p><span style="font-weight: 400;">We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.</span></p></div>