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Operations Engineer, HPC Networking

Hands-on operations engineer maintaining and troubleshooting high-performance InfiniBand and Ethernet networking fabrics in large-scale GPU clusters. Requires production experience with subnet management, full-stack debugging, fabric bring-up, and scripting.

United StatesDevOps / SRERemote

About the role

Responsibilities

  • Monitor health and performance of InfiniBand and Ethernet fabrics: switches, HCAs, transceivers, links.
  • Investigate and resolve fabric issues: connectivity, congestion, performance regressions.
  • Support fabric bring-up alongside DC ops and customer-facing teams.
  • Run maintenance and upgrades on switches and control plane components.
  • Partner with cluster ops on cross-domain incidents where the line between compute and network is blurry.
  • Improve the tooling and runbooks so the next incident resolves faster.

Requirements

  • Operated InfiniBand fabrics in production: subnet manager, routing, partitioning, monitoring.
  • Debugged the full stack: cables, transceivers, switch firmware, HCAs, drivers, NCCL.
  • Brought up new fabrics from cable pull through validation.
  • Scripted your way through repetitive operational work (bash, python, go).

Nice to Have

  • Ethernet RoCE, Spectrum-X, or large-scale GPU cluster networking.

Skills

InfiniBandEthernetNcclSubnet ManagerHcasSwitch FirmwareRoceSpectrum-XBashPythonGoGpu Cluster Networking

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