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xAI is building large-scale networks that underpin training and inference infrastructure for AI systems, including high-performance supercompute fabrics connecting GPU clusters and core/edge/datacenter networks. We are seeking a hands-on Network Engineer to own production network design, deployment, and operations end-to-end.
This is a senior individual contributor role focused on practical engineering work—not a NOC technician position or network software platform role. You will design and build networks, qualify new platforms and topologies, ship changes safely, and maintain high availability and performance as the infrastructure scales.
Key responsibilities include:
- Design, deploy, and operate production datacenter and campus/core networks at scale
- Own routing and switching configuration standards (BGP and IGP protocols like OSPF or IS-IS), including change design, peer review, and execution
- Qualify new network platforms, optics, and topologies; contribute to architecture and capacity planning
- Build and improve monitoring, alerting, and operational documentation to catch and fix issues quickly
- Troubleshoot Layer 2/Layer 3 incidents end-to-end—from link flaps and optics through routing and traffic engineering—and drive root cause and lasting fixes
- Automate repetitive network tasks using Python, Ansible, or similar tools to reduce operational toil
- Partner with compute, facilities, and software teams during cluster build-outs and maintenance windows
- Support high-performance and supercompute network environments (Ethernet AI/HPC fabrics, RoCE/RDMA-capable designs)
Travel to Memphis and other build sites may be required for capacity build-outs. You will participate in a team on-call rotation. The company operates with a flat organizational structure where all employees are hands-on contributors expected to show initiative and deliver excellence.
Requirements:
- Several years of hands-on experience designing and/or operating production networks in a datacenter, ISP, cloud, or large enterprise environment
- Solid hands-on experience with BGP and at least one interior routing protocol (OSPF, IS-IS, or equivalent)
- Working knowledge of TCP/IP, VLANs, EVPN/VXLAN or equivalent datacenter overlays, and optics/high-speed Ethernet
- Experience troubleshooting live production network incidents and participating in on-call rotations
- Strong written and verbal communication skills; ability to write clear change documentation and incident notes
- Willing to work onsite in Dublin
Preferred experience:
- Hands-on work with modern datacenter vendors (Arista, Cisco, Juniper, Nvidia/Mellanox)
- Familiarity with high-performance or supercompute networking (RoCEv2, congestion control, GPU cluster fabrics)
- Network automation in production environments (Python, Ansible, Terraform)
- Experience with EVPN, leaf-spine architectures, and large-scale Ethernet fabrics
- Prior work supporting rapid datacenter or cluster capacity build-outs
