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