Senior It Engineer (Network)

TL;DR

Senior IT Engineer (Network): Designing, implementing, and operating the global office and data center network for a large digital financial platform with an accent on connectivity, performance, and security. Focus on new office rollouts, critical connectivity improvements, and the evolution towards Infrastructure as Code (IaC).

Location: This role follows our hybrid work model and requires being in the office at least 2–3 times per week in Brazil, with a strong preference for candidates who can work from our offices in Rio de Janeiro or Belo Horizonte.

Company

Nu is one of the largest digital financial platforms in the world, with more than 127 million customers across Brazil, Mexico, and Colombia.

What you will do

• 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.
• Configure and support wireless networks, with strong experience in vendors such as Aruba and Cisco.
• Operate and tune load balancers to guarantee optimal application delivery and resilience.
• Drive the transition away from manual configuration towards Infrastructure as Code (IaC) using tools such as GitHub, Terraform, and/or Ansible.
• Lead or co‑lead new office implementations and major network changes, coordinating with Workplace, Connectivity, and other partner teams.

Requirements

• 5+ years of experience in enterprise networking or infrastructure engineering, working with critical environments.
• 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 experience operating network monitoring and performance tools in production environments.
• Experience with load balancers and DNS‑related components.
• Exposure to network security components and comfort collaborating with security teams in a “security‑first” posture.
• Experience with or strong interest in Infrastructure as Code (IaC) and automation for network configuration and lifecycle management.
• Ability to lead initiatives and coordinate teams during new office rollouts, complex changes, and incident response.
• Intermediate English (spoken and written), with the ability to participate in meetings and collaborate with global teams.

Nice to have

• Familiarity with Zero Trust network concepts and security‑driven networking.
• Experience with cloud networking and hybrid environments.
• Experience with security mindset and encryption topics.
• Prior experience in distributed or global organizations.

Culture & Benefits

• Chance of earning equity at hirify.global.
• Food/Meal Card.
• Public Transportation Commuting Benefit.
• NuCare – Psychological, Financial and Legal Assistance Program.
• 30 days of paid vacation.