HPC Network Engineer

Overview

In this role you will design, deploy, and operate the network fabric for Fuse’s multi-tenant AI cluster and office environment. You’ll build lossless, RDMA-capable fabrics and leaf-spine data centre networks to support GPU compute and storage at scale, with per-tenant isolation and automated provisioning. You’ll own from architecture to day-2 operations, collaborating with cross-functional teams to ensure reliable, high-performance connectivity that enables our energy and AI platforms to scale. This is a hands-on opportunity to shape a global, fault-tolerant network in a fast-growing, mission-driven company.

Pay / Benefits

• Competitive salary and equity
• Biannual bonus scheme
• Fully expensed tech
• Private health insurance
• Breakfast and dinner allowance

Responsibilities

• Design and operate lossless, RDMA-capable fabrics for GPU compute and storage traffic with QoS and tuning
• Build and manage leaf-spine data centre fabrics with routed underlay/overlay (BGP, EVPN/VXLAN)
• Implement per-tenant network isolation across compute, storage, and management planes
• Automate provisioning and validation using config-as-code (Ansible, Python, NetBox) and CI workflows
• Develop telemetry and observability for the fabric (flow/ buffer visibility, dashboards, alerts)
• Troubleshoot end-to-end performance from optics to NIC/DPU configuration
• Operate the out-of-band management network and remote recovery paths
• Support tenant onboarding and capacity planning as cluster scales
• Write design documentation capturing decisions and rationale
• Own and maintain the office network (wired/wireless, firewalling, VPN, data-centre connectivity)
• Upskill colleagues through documentation and paired work

Key requirements

• 5+ years as a network engineer on production data centre networks
• Strong dynamic routing experience (BGP) with overlay/encapsulation (EVPN/VXLAN)
• Hands-on experience with leaf-spine / Clos fabrics
• Experience with modern data centre OS and Linux networking stack
• Practical RDMA fabric experience (RoCEv2 with PFC/ECN/DCQCN or InfiniBand)
• Network automation: scripting (Python), configuration management (Ansible), source-of-truth with versioned changes
• Solid Linux administration fundamentals (host and switch debug)
• Experience with network telemetry/monitoring (Prometheus/Grafana, sFlow/IPFIX)
• Experience with wired and wireless campus networks, NAC/802.1X, VPN
• Clear communicator who enjoys teaching

• teaching and knowledge sharing
• clear communication
• collaboration
• RoCEv2 / InfiniBand RDMA fabrics
• BGP and EVPN/VXLAN overlay design
• Leaf-spine / Clos fabric design and operation

…