Network Infrastructure Engineer, Global Network Infra (WAN)
OpenAI · San Francisco
About this role
## About the Team OpenAI’s Global Network Infrastructure team builds and operates the global network backbone that connects OpenAI’s expanding compute infrastructure. The team enables reliable, high-performance connectivity across data centers, cloud service providers, and network points of presence (PoPs), supporting the infrastructure behind OpenAI’s research and products. As OpenAI scales globally, the team expands network capacity, reliability, and operational efficiency through physical network design, carrier connectivity, network deployment, and operational troubleshooting. ## About the Role We’re looking for a hands-on **Network Infrastructure Engineer** to design, deploy, activate, and operate OpenAI’s global wide area network (WAN) infrastructure. In this role, you’ll take direct ownership of bringing new network connectivity online—working with fiber providers, cloud service providers, and internal infrastructure teams to establish reliable connectivity across OpenAI’s global backbone. You’ll troubleshoot connectivity across **Layer 1, Layer 2, and Layer 3**, and help expand our network footprint by bringing new PoPs online. We’re seeking engineers who enjoy working close to the infrastructure, solve difficult networking problems, and bring an **automation-first** mindset to scaling network operations. ## In This Role, You Will - Design, deploy, and support WAN infrastructure across data centers, network PoPs, and cloud connectivity environments. - Own end-to-end activation and turn-up of network circuits with fiber carriers and cloud service providers. - Troubleshoot complex network issues across physical, Layer 2, and Layer 3 infrastructure (including optical signal problems, FEC errors, routing issues, and connectivity failures). - Diagnose and isolate network failures across carrier, cloud provider, and internal infrastructure boundaries, driving issues through resolution. - Contribute to physical network infrastructure design (port mappings, fiber/cable layouts, ODFs, and connectivity planning). - Monitor network health, circuit utilization, and performance to proactively identify capacity constraints and reliability risks. - Build automation and tooling to streamline provisioning, deployment validation, troubleshooting, and operational workflows. - Collaborate with network engineering, data center infrastructure, and external service providers to support backbone expansion. - Participate in an on-call rotation to maintain reliability and availability of critical network infrastructure. ## You Might Thrive in This Role If You - Have hands-on experience deploying, activating, and troubleshooting WAN circuits with telecommunications carriers, fiber providers, or cloud service providers. - Understand networking fundamentals including optical networking, Ethernet, TCP/IP, BGP, and Layer 2/3 connectivity. - Can debug issues across multiple layers—from physical fiber/optical errors to routing and traffic forwarding. - Have experience with data center networking, carrier infrastructure, cloud interconnects, or large-scale WAN environments. - Understand physical network infrastructure concepts such as fiber cabling, port mappings, optical distribution frames, and equipment connectivity. - Can independently investigate ambiguous connectivity problems, isolate root causes, and work across internal/external teams to restore service. - Have scripting/automation experience and are motivated to reduce manual work with repeatable
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