Senior Network Engineer - HPC/ AI/ GPU

JR United Kingdom; London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading company in London seeks a Senior Network Engineer for a 6-month contract. You will design and operate ultra-low-latency networks for AI workloads, collaborating with Systems and DevOps teams. Ideal candidates have experience in HPC networking and strong skills in network automation.

Qualifications

• 3–5+ years in HPC or AI networking, supporting GPU clusters.
• Deep knowledge of BGP, EVPN, VXLAN, MPLS.

Responsibilities

• Design and scale leaf-spine fabrics with Mellanox + Cumulus.
• Deploy and manage Juniper PTX routers and SRX firewalls.
• Own incident response and drive root-cause analysis.

Skills

High Performance Computing

AI networking

Network Automation

Linux CLI

Tools

Ansible

Python

Mellanox

Cumulus Linux

Juniper

Job description

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Client:

aap3 Recruitment

Location:

London, United Kingdom

Job Category:

Other

EU work permit required:

Yes

Job Views:

5

Posted:

12.05.2025

Expiry Date:

26.06.2025

Job Description:

6-month contract based in London.

Help build the ultra-fast network backbone behind next-generation AI.

As a Senior Network Engineer, you’ll architect, deploy, and operate the ultra-low-latency network fabric that powers our GPU clusters. You'll work closely with our Systems, DevOps, and AI Platform teams to design fault-tolerant, high-throughput networks tailored for cutting-edge machine learning workloads.

What you’ll do:

• Design and scale leaf-spine fabrics with Mellanox + Cumulus
• Deploy and manage Juniper PTX routers and SRX firewalls
• Automate infrastructure with Ansible and Python
• Monitor and tune networks for high-volume AI workloads
• Own incident response and drive root-cause analysis

What you’ll bring:

• 3–5+ years in HPC (High Performance Computing) or AI networking, supporting GPU clusters
• Deep knowledge of BGP, EVPN, VXLAN, MPLS
• Hands-on experience with Mellanox switches, Cumulus Linux, and Juniper
• Strong Linux CLI and network automation skills (Ansible, Python)

Bonus if you have:

• JNCIE/CCIE certifications, hybrid cloud networking (AWS/Azure), and experience with network telemetry