Senior HPC Network Engineer: GPU Scale & Fabric Design

Pathway Search; Sydney; On-site; AUD 120,000 - 190,000; Full time

Job summary

Pathway Search is seeking a senior network engineer to design, deploy, and operate high-performance network fabrics powering large-scale GPU clusters. You will tune switch fabrics for low-latency AI/ML workloads and collaborate with infrastructure teams to optimize distributed training and inference.

The role requires hands-on HPC networking experience, deep knowledge of GPU networking demands, and familiarity with Nvidia technologies. Strong production-scale background is highly valued.

Qualifications

• Hands-on experience with high performance computing (HPC) networking environments.
• Strong understanding of GPU infrastructure and the networking demands of AI/ML workloads.
• Experience with switch fabric design, deployment, and operations at scale.
• Familiarity with Nvidia networking technologies (e.g. InfiniBand, Spectrum-X, NVLink/NVSwitch ecosystems).
• We'll also consider candidates without direct HPC/AI experience if they bring large-scale network engineering from hyperscaler or major cloud providers.

Responsibilities

• Design, build, and operate high-performance network fabrics supporting large-scale GPU clusters.
• Deploy and tune switch fabrics for low-latency, high-throughput AI/ML workloads.
• Work closely with infrastructure and platform teams to optimise network performance for distributed training and inference.
• Troubleshoot and resolve complex network issues across HPC and GPU-dense environments.
• Plan capacity and topology for ongoing GPU infrastructure expansion.
• Partner with vendors (including Nvidia) on hardware qualification, firmware, and fabric design.
• Contribute to standards and best practices for network architecture as the environment scales.

Skills

HPC networking

GPU infrastructure

Switch fabric design

Nvidia networking tech

Large-scale network engineering

Production switch fabrics

Scale-out networking

Tools

InfiniBand

NVLink/NVSwitch

Spectrum-X

Job description

Pathway Search is seeking a senior network engineer to design, deploy, and operate high-performance network fabrics powering large-scale GPU clusters. You will tune switch fabrics for low-latency AI/ML workloads and collaborate with infrastructure teams to optimize distributed training and inference.

The role requires hands-on HPC networking experience, deep knowledge of GPU networking demands, and familiarity with Nvidia technologies. Strong production-scale background is highly valued.