Senior Network Engineer
STN Inc•San Francisco, CA
•Hybrid
About The Position
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.
Requirements
- 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
Nice To Haves
- 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
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
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
