Staff Software Engineer - Payments Gateway

We are looking for a person who has Required Staff-level backend engineering experience (or equivalent) designing and operating high-scale, mission-critical systems. Strong background in payments / POS / acquiring backends, with experience in transaction processing and connectivity with acquirers and/or payment networks. Hands-on experience with ISO 8583 (or very similar card-payment protocols) and the surrounding concepts (authorization flows, reversals, settlement, offline/queued transactions). Experience working with or alongside POS / embedded / payments hardware teams, understanding constraints around peripherals, connectivity, offline behavior and latency. Proven track record designing and evolving gateways or switches that connect to multiple acquirers or processors. Ability to operate as a technical leader and knowledge-multiplier : mentoring senior engineers, running structured design sessions and defining long-term technical direction. Strong communication skills and resilience : comfortable dealing with incidents, complex cross-team situations and external stakeholders, and able to keep discussions productive under pressure. Proven experience with PCI DSS v4.0 compliance standards, with the ability to design architectures that ensure secure isolation of the CDE (Cardholder Data Environment) and meet payment data security requirements. Comfort working in a hybrid model in Brazil (São Paulo or Belo Horizonte ) collaborating in English and Portuguese across local and global teams. Nice to have Experience at companies that have internalized POS/acquiring stacks (e.g., Mercado Pago, PagBank, Stone, Infinity Pay, or similar players). Previous work on Tap to Pay or SoftPOS solutions. Familiarity with regulatory and compliance aspects of card-present payments in Brazil. Location for this opportunity Brazil – Hybrid hubs: São Pauloor Belo Horizonte (aligned with Nubank’s official office locations). Work Model for this Role Hybrid 2–3 times/week : Our hybrid work model brings us to the office at least twice a week, on strategic days designed to maximize team connection and collaboration. For more details, visit https://building.nubank.com/nu-hybrid-work-model/ Our Benefits – Brazil (Employee, Hybrid) Chance of earning equity at Nubank Food / Meal Card (Vale-Refeição and/or Vale-Alimentação) Public Transportation Commuting Benefit (Vale-Transporte) NuCare – Psychological, Financial and Legal Assistance Program Life Insurance Medical Plan Dental Plan NuLanguage – Language Course Program Nucleo – Our learning platform of courses Extended Parental Leave Daycare Allowance Parental Consultancy Work-from-home Allowance Gym Partnerships 30 days of paid vacation Relocation Assistance Package , if applicable Join us If you want to build the payments gateway that will power Nubank’s POS and Tap to Pay products — combining deep industry protocols, large-scale backend engineering and long-term platform design — we’d love to hear from you. Apply now to be our Staff Software Engineer – Payments Gateway in Brazil.