HPC Networking Architect for GPU Clusters

Fuse Energy; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Competitive salary and an equity sign‑

Biannual bonus scheme

Fully expensed tech to match your need

Breakfast and dinner allowance for off

Job summary

Fuse Energy is seeking a senior network engineer to design, deploy and operate the fabric for a multi-tenant AI cluster and data centre. You will own architecture, day-2 operations, and keep the network secure, scalable and observable.

You will implement lossless RDMA fabrics (RoCEv2/InfiniBand), leaf-spine designs, automation with Ansible and NetBox, and deliver clear design documentation while mentoring colleagues across teams.

Qualifications

• 5+ years of production data centre networking experience.
• Strong BGP/EVPN/VXLAN design and troubleshooting.
• Hands-on experience with leaf-spine/Clos fabrics and Linux networking.

Responsibilities

• Design and operate lossless, RDMA-capable fabrics for GPU compute and storage.
• Build leaf-spine data centre fabrics with routed underlay and overlay design.
• Implement per-tenant network isolation across compute, storage, and management.
• Automate provisioning, configuration, and validation; treat switch config as code.
• Build telemetry and observability for fabric with dashboards and alerts.
• Troubleshoot performance end-to-end from optics to NIC/DPU configuration.
• Operate the out-of-band management network and remote recovery paths.
• Support tenant onboarding: segmentation, addressing, bandwidth guarantees.
• Write design documentation detailing decisions and reasoning.
• Own office network: wired/wireless, firewalling, VPN, and connectivity to data centre.
• Upskill colleagues through documentation, run-throughs, and pairing.

Skills

Network engineering

BGP

EVPN/VXLAN

Leaf-spine design

Linux networking

Python scripting

Automation

Documentation

Telemetry/Monitoring

Campus networking

Tools

Ansible

NetBox

Prometheus/Grafana

MAAS

PXE

Job description

Fuse Energy is seeking a senior network engineer to design, deploy and operate the fabric for a multi-tenant AI cluster and data centre. You will own architecture, day-2 operations, and keep the network secure, scalable and observable.

You will implement lossless RDMA fabrics (RoCEv2/InfiniBand), leaf-spine designs, automation with Ansible and NetBox, and deliver clear design documentation while mentoring colleagues across teams.