Lead AI Infra SRE: Scale, Reliability & Mentorship

Radiant; Gloucester; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

25 days annual leave

Cycle to Work Scheme

Gympass subscription

Job summary

Radiant is pursuing an experienced Infrastructure Site Reliability Engineer to run and evolve our AI-native infrastructure stack in the UK. You’ll cover bare-metal, virtualization, and orchestration layers while mentoring teammates and improving automation to support AI/HPC workloads.

You will configure and operate resilient Linux systems (Ubuntu), refine performance, and contribute to the observability stack with Prometheus and Grafana.

Qualifications

• Experience operating in 24/7 performance‑critical environments.
• Expert Linux administration, Ubuntu preferred.
• Strong networking and automation scripting skills.
• Familiarity with ITSM and incident response is a bonus.

Responsibilities

• Deploy and operate scalable infrastructure for AI/HPC workloads.
• Configure and maintain bare-metal and virtualization layers.
• Develop automation scripts and IaC to support platform lifecycle.
• Lead on-call rotation and incident response processes.

Skills

Linux administration

Networking fundamentals

Automation scripting

Observability tooling

Kubernetes

Scripting: Bash

Python

Education

Bachelor/Master in CS/Engineering or related

Tools

IPMI

Redfish

PXE

Prometheus

Grafana

MAAS

Tinkerbell

Job description

Radiant is pursuing an experienced Infrastructure Site Reliability Engineer to run and evolve our AI-native infrastructure stack in the UK. You’ll cover bare-metal, virtualization, and orchestration layers while mentoring teammates and improving automation to support AI/HPC workloads.

You will configure and operate resilient Linux systems (Ubuntu), refine performance, and contribute to the observability stack with Prometheus and Grafana.