Staff Software Engineer | NuPay

About U s Nubank was founded in 2013 to free people from a bureaucratic, slow and inefficient financial system. Since the n, through innovative technology and outstanding customer service, the company has been redefining people's relation ships with money across Latin America. With operations in Brazil, Mexico, and Colombia, Nubank is today one of the largest digital b anking platforms and technology-leading companies in the worl d. Nubank was listed on the NYSE in 2021 and was recently named one of Time Magazine's 100 Most Influential Companies. For more information, visit www.nu.com .br. About the Role NuPay is a primary pillar in Nubank’s mission to revolutionize BNPL (Buy Now, Pay Later) solutions, creating a seamless bridge between customers and merchants. By stripping away the friction of traditional e-commerce checkouts, we are building an ecosystem where secure, instant payments are accessible across all channels—from online carts to physical stores via digital wallets. You will join the NuPay team as a technical anchor, driving the evolution of a payments stack that balances massive scale with ironclad reliability. This role is about more than just moving bits; it’s about architecting the financial infrastructure that millions of people and businesses rely on to grow, ensuring every transaction is a bridge of trust between Nubank and our partners. As a senior technical leader, you will oversee the technical direction of our payment features, navigating the complexities of authorization and settlement while mentoring the next generation of engineers. You will sit at the intersection of product innovation and platform stability, ensuring our checkout experience remains the gold standard for Latin American fintech. Responsibilities Architect scalable systems for the NuPay domain, ensuring seamless and robust integration with our global internal payment platforms. Lead technical design for core payment lifecycles—including authorization, capture, settlement, and reconciliation—while balancing performance with security. Scale the payments platform to maintain high availability during extreme traffic surges, such as Black Friday or major retail events. Partner with Product Managers to iterate on the checkout journey, optimizing for high conversion and low churn while maintaining a world-class NPS. Define engineering standards for architecture, observability, and security, influencing multiple squads to uphold a high quality bar. Collaborate with Risk and Finance teams to engineer solutions that satisfy complex regulatory requirements without compromising the user experience. Required Qualifications Track record of technical leadership in architecting complex, distributed software environments at scale. Deep expertise in high-availability systems , with demonstrated ability to perform rigorous trade-off analysis for long-term scalability. Background in high-criticality FinTech , specifically within Payments or Core Banking environments governed by strict SLAs. Evidence of delivering high-throughput systems using modern engineering practices, including automated testing, observability, and safe rollout strategies. Experience mentoring senior engineers , fostering a culture of technical excellence and shared ownership across organizational boundaries. Nice to Have Experience with acquiring, sub-acquiring, or payment gateway architecture. Previous involvement with e-commerce or marketplace platforms managing proprietary payment stacks. Location & Work Model This role is based in São Paulo or Campinas, Brazil or Toronto, Canada or Buenos Aires, Argentina on a Hybrid model . Diversity & Inclusion / Equal Opportunity At Nubank, we believe that diversity is essential to building the best products and services. We are committed to creating a welcoming work environment that respects and values diversity in all its forms, and we encourage people from all backgrounds to apply. We are proud to be an equal opportunity employer and do not