Senior Network Engineer

Senior Network Engineer

Infrastructure operations · shared across customers

Reports to: Director, Network Engineering

Location: Remote (US) or Pleasanton, CA (hybrid)

Department: Infrastructure & DC Operations / Network Engineering

Position summary

The Senior Network Engineer designs, deploys, and operates the high-performance networking fabric supporting GPU clusters. This includes InfiniBand and RoCE fabrics for training workloads, customer-facing connectivity, and the wide-area network that connects STN sites and customer environments.

Key responsibilities

• Design and configure InfiniBand or RoCE fabrics optimized for GPU training and distributed inference

• Configure and operate switching, routing, and customer VLAN/VRF/VPC architectures

• Manage BGP peering, public IP space, anycast, and DDoS protection

• Design customer connectivity including cross-connects, dedicated links, VPN, and SD-WAN

• Maintain network automation, configuration management, and source-of-truth tooling

• Coordinate with the NOC on network monitoring, alerting, and runbook authoring

• Troubleshoot complex network issues across layers 1 through 7

• Maintain network documentation, diagrams, and operational runbooks

• Drive network capacity planning aligned to fleet growth and customer commitments

• Support security and compliance audits including SOC 2 and customer security reviews

Required qualifications

• 7+ years in network engineering with data center or service provider experience

• Deep expertise in InfiniBand or RoCE (RoCEv2), including congestion control and NCCL tuning

• Strong knowledge of BGP, OSPF, MPLS, VXLAN, and EVPN

• Hands-on experience with Arista, NVIDIA Mellanox/Spectrum, or Cisco platforms

• CCIE, JNCIE, NCIE, or equivalent advanced certification strongly preferred

Preferred qualifications

• GPU cluster networking experience at multi-thousand-GPU scale

• SDN and automation skills (Ansible, Python, Nautobot, or Netbox)

• Multi-site WAN and peering experience including IX participation

Familiarity with NVIDIA Cumulus, SONiC, or open networking stacks