Senior Network Engineer (Fintech)

TL;DR

Senior Network Engineer (Fintech): Designing, implementing, and maintaining scalable and resilient network solutions for a digital financial platform with an accent on regulatory connectivity, product connectivity, and third-party integrations. Focus on automation, observability, and governance-first connectivity stack, including responsible use of AI to improve reliability and operations.

Location: Hybrid – from January 2027, three days per week in the Mexico City office.

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 and implement scalable, resilient network solutions aligned with business and regulatory requirements.
• Own High‑Level and Low‑Level Designs (HLD/LLD) for connectivity initiatives across data centers, WAN, cloud edge and partners.
• Build and evolve data center and WAN connectivity platforms (including VXLAN/EVPN fabrics), ensuring reliability, performance and observability at scale.
• Support production environments with incident troubleshooting, change execution and root cause analysis, including participation in a weekly on‑call rotation.
• Manage and improve network observability and monitoring, analyze performance and implement optimizations for speed, reliability and efficiency.
• Drive automation and observability initiatives, helping us move from manual processes to automation‑ and observability‑driven operations over time.

Requirements

• 5+ years of hands‑on experience as a Network Engineer (or similar role) designing and operating production networks at scale.
• Strong networking fundamentals (Layer 2, Layer 3, High availability).
• Solid experience operating Next‑Gen Firewalls, ideally Palo Alto and/or Fortinet.
• Experience with WAN technologies such as MPLS, L3VPN, L2VPN, SD‑WAN or Carrier Ethernet.
• Strong knowledge of core network services and protocols: DNS, DHCP, NTP, SNMP, AAA, TCP/IP.
• Experience working in an Agile environment, collaborating with cross‑functional teams and stakeholders.

Nice to have

• Experience with network automation and Infrastructure as Code (IaC) using tools such as Terraform, Ansible and Python for automated network provisioning and configuration.
• Cloud networking experience (AWS or similar), including VPC design, hybrid connectivity and security controls.
• Experience with Kubernetes or modern platform environments, especially in how they interact with underlying network and security layers.
• Exposure to AI/ML applications in networking (e.g., anomaly detection, traffic analysis, predictive capacity planning), and interest in helping identify realistic, high‑impact use cases for these capabilities in our environment.

Culture & Benefits

• Committed to building a diverse and inclusive team.
• Encourage applications from people of all backgrounds and identities, even if you don’t meet 100% of the requirements.