Senior IT Engineer – Global Offices Network

About Us Nu is one of the largest digital financial platforms in the world, with more than 127 million customers across Brazil, Mexico, and Colombia. Guided by our mission to fight complexity and empower people, we are redefining financial services in Latin America — and this is still just the beginning of the purple future we’re building. Listed on the New York Stock Exchange (NYSE: NU), we combine proprietary technology, data intelligence, and an efficient operating model to deliver financial products that are simple, accessible, and human. Our impact has been recognized by global rankings such as Time 100 Companies, Fast Company’s Most Innovative Companies, and Forbes World’s Best Bank. Learn more about our career opportunities here. About the Role We are looking for a Senior IT Engineer to design, implement, and operate our global office and data center network . In this role, you will own the connectivity and performance of Nu’s physical locations, ensuring that our offices and data centers are reliable, secure, and ready to support our next waves of growth. You will work on routing, switching, wireless, security, and observability across our global stack, leading key initiatives such as new office rollouts, critical connectivity improvements, and the evolution towards Infrastructure as Code (IaC) . You will be part of the Global Offices Network team, working closely with peers in Connectivity, Security, and Workplace to provide a seamless experience for Nubankers worldwide. What You’ll Be Responsible For Network & Connectivity Design, implement, and support enterprise network infrastructure for offices and data centers, including routing, switching, and wireless. Maintain and evolve high‑availability data center fabrics (e.g., spine‑and‑leaf topologies with Juniper/Cisco hardware). Ensure robust connectivity between offices and data centers , including WAN and SD‑WAN solutions, focusing on performance, reliability, and scalability. Wireless, Load Balancing & Security Configure and support wireless networks (controllers and access points), with strong experience in vendors such as Aruba and Cisco. Operate and tune load balancers (e.g., F5 , including DNS/ZoneRunner concepts) to guarantee optimal application delivery and resilience. Collaborate with security teams on Next‑Generation Firewalls (e.g., Palo Alto, Fortinet) and cloud security brokers (e.g., Zscaler) in a “security‑first” network design. Automation, IaC & Observability Drive the transition away from manual configuration towards Infrastructure as Code (IaC) using tools such as GitHub, Terraform, and/or Ansible . Implement and maintain network performance monitoring and observability using tools like PRTG, Prometheus, Grafana, SolarWinds or similar , ensuring proactive detection and resolution of incidents. Manage PKI-related activities , including SSL/TLS certificate lifecycle and ensuring secure encrypted communications across services and endpoints. Delivery & Collaboration Lead or co‑lead new office implementations and major network changes, coordinating with Workplace, Connectivity, and other partner teams. Act as a technical reference for incident response and problem management in critical networking issues, helping restore services quickly and preventing recurrences. Document architectures, runbooks, and standards, helping scale knowledge across the team. Mentor more junior engineers and collaborate in a multi‑level team (IC6, IC5, IC3, IC4) to continuously improve how we operate our global infrastructure. We Are Looking for a Person Who Has 5+ years of experience in enterprise networking or infrastructure engineering , working with critical environments (e.g., large offices, data centers, or mission‑critical operations). Strong hands‑on experience with routing and switching , ideally using vendors such as Cisco and/or Juniper. Experience implementing and supporting wireless networks , especially with Aruba and/or Cisco wireless solutions. Solid experienc