> Markdown version of [/jobs/ext/2821553-hpc-network-engineer](https://www.wearedevelopers.com/jobs/ext/2821553-hpc-network-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # HPC Network Engineer - **Company:** Fuse Limited - **Location:** Greater London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** IEEE 802.1X, Border Gateway Protocol, Network Operating System (NOS), Common Lisp Object Systems, Configuration Management, Computer Networks, Network Congestion, Data Centers, Software Debugging, Ethernet, Network Interface Controllers, InfiniBand, Storage Area Network (SAN), Virtual Private Networks (VPN), Python (Programming Language), Linux System Administration, Performance Tuning, Remote Direct Memory Access, Remote Access Technology, Ansible, Prometheus, Data Streaming, Encapsulation (Networking), Wireless Networks, Dynamic Routing, Grafana, Bare Metal, Fortinet, Open Network Automation Platform, Nvme - **Published:** September 10, 2026 - **Apply:** https://www.collegerecruiter.com/job/2859586709-hpc-network-engineer ## About the Role * Strong dynamic routing experience (BGP in particular), plus overlay/encapsulation design and troubleshooting (e.g. EVPN/VXLAN) * Hands-on experience with leaf-spine / Clos fabric design and operation * Experience with modern data centre network operating systems and comfortable in the Linux networking stack, not just a vendor CLI * Practical RDMA fabric experience: lossless Ethernet (e.g. RoCEv2 with PFC/ECN/DCQCN tuning) or InfiniBand, understanding why lossless behaviour matters for GPU workloads * Network automation as a working practice: scripting (e.g. Python), configuration management (e.g. Ansible), config generation from a source of truth, version-controlled changes * Solid Linux administration fundamentals: you can debug from the host side as well as the switch side * Experience with network telemetry and monitoring (e.g. Prometheus/Grafana, sFlow/IPFIX, streaming telemetry) * Experience running corporate/campus networks: wired and wireless, switching, NAC/802.1X, VPN and remote access * Clear communicator who enjoys teaching * Bonus: GPU cluster networking (NVIDIA Spectrum-X or Quantum InfiniBand, ConnectX/BlueField NICs and DPUs, UFM, SHARP or equivalent); container networking (CNI, BGP integration); collective-communication libraries; multi-tenant VRF-based isolation; enterprise firewalls (FortiGate, Palo Alto); storage networking (NVMe-oF); bare-metal provisioning (MAAS, PXE, Redfish); optical layer at 200/400/800G; greenfield data centre network build; CCNP/CCIE or equivalent ## Description * Design and operate lossless, RDMA-capable fabrics (e.g. RoCEv2, InfiniBand) for GPU compute and storage traffic, including QoS, congestion control and buffer tuning at scale * Build and manage leaf-spine data centre fabrics, with routed underlay and overlay design (e.g. BGP, EVPN/VXLAN) * Implement and maintain per-tenant network isolation across compute, storage and management planes * Automate network provisioning, configuration and validation, treating switch config as code (e.g. Ansible, Python, NetBox as source of truth), deployed through CI * Build telemetry and observability for the fabric: flow-level and buffer-level visibility, dashboards and alerting that catch congestion and link degradation before tenants do * Troubleshoot performance issues end to end, from optics and cabling through switch buffers to NIC/DPU configuration and collective-communication behaviour on the hosts * Operate the out-of-band management network, console access and remote recovery paths * Support tenant onboarding: segmentation and addressing, bandwidth and isolation guarantees, and capacity planning as the cluster scales * Write clear design documentation capturing decisions, rationale and rejected alternatives * Own and maintain the office network: wired and wireless infrastructure, firewalling, VPN/remote access and office-to-data-centre connectivity * Upskill colleagues on networking through documentation, run-throughs and pairing ## Related Videos - [5 steps for running a Kubernetes environment at scale](https://www.wearedevelopers.com/videos/88-5-steps-for-running-a-kubernetes-environment-at-scale) - [Dev & Test in the Cloud? Deploy your cloud environments with Ansible & Terraform](https://www.wearedevelopers.com/videos/1607-dev-test-in-the-cloud-deploy-your-cloud-environments-with-ansible-terraform) - [The Gashlycrumb Tinies of AI Networking You Must Know (or Languish!)](https://www.wearedevelopers.com/videos/2067-the-gashlycrumb-tinies-of-ai-networking-you-must-know-or-languish) - [Embracing the Hybrid Cloud: Unlocking Success with Ansible](https://www.wearedevelopers.com/videos/932-embracing-the-hybrid-cloud-unlocking-success-with-ansible) - [All your telemetry data from any source in one place](https://www.wearedevelopers.com/videos/57-all-your-telemetry-data-from-any-source-in-one-place) - [Demystifying application networking in the cloud](https://www.wearedevelopers.com/videos/675-demystifying-application-networking-in-the-cloud) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Top 6 Hackathons for Developers in 2023](https://www.wearedevelopers.com/magazine/263-top-6-hackathons-for-developers-in-2023) - [Basic And Advanced Networking in Dart and Flutter](https://www.wearedevelopers.com/magazine/112-basic-and-advanced-networking-in-dart-and-flutter) - [7 Cloud Computing Trends Coming in 2025 for Developers](https://www.wearedevelopers.com/magazine/412-7-cloud-computing-trends-coming-in-2025-for-developers) - [Best US AI Conferences for CTOs in 2026: Build vs. Buy, Vendor Evaluation, and Peer Intelligence](https://www.wearedevelopers.com/magazine/736-best-us-ai-conferences-for-ctos-in-2026-build-vs-buy-vendor-evaluation-and-peer-intelligence) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)