Cloud Infrastructure Support Engineer

📋 Job Overview

We are seeking a highly skilled Cloud Infrastructure Support Engineer to join our global Customer Support team. The primary goal of this team is to delight our customers worldwide by ensuring that any incident related to Radiant’s Cloud Platform, High Performance Computing (HPC), and AI supercomputer fleet (some of the fastest machines in the world) is resolved swiftly and decisively in collaboration with our engineering teams and third-party suppliers.

🏢 About Radiant

Radiant is at the forefront of AI infrastructure, revolutionising the connection between software and hardware for the AI era. Our mission is to empower AI teams with scalable, secure, and efficient infrastructure solutions that support seamless model training, deployment, and scaling.

🎯 The Role

Join a team operating some of the world’s most advanced high-performance computing infrastructure. As a Cloud Support Engineer, you will support cutting-edge GPU and CPU platforms — including the latest NVIDIA architectures — powering dense, large-scale compute environments used for AI, machine learning, and next-generation workloads.

✅ Key Responsibilities

• Maintain the highest levels of customer satisfaction: you will ensure the brightest minds in the AI industry, who work on bleeding edge technologies, remain delighted at all times.
• Deliver outstanding customer support: Ensure customers working on cutting-edge AI technologies receive timely, professional, and high-quality support at all times.
• Respond to incoming customer queries: Act as the owner of assigned incidents by triaging requests, gathering relevant information, documenting findings, and driving issues toward resolution.
• Advanced troubleshooting: Diagnose and debug sophisticated hardware and software issues across cloud, Linux, and datacenter environments.
• Incident escalation and collaboration: Work closely with L3 and L4 support teams within Engineering to escalate complex issues.
• 24/7 support participation: Participate in Radiant’s continuous “follow the sun” support model.
• Vendor interactions: Collaborate with third-party vendors when necessary to accelerate issue resolution.
• New system delivery support: Occasionally contribute to the deployment of new AI supercomputers.
• Documentation and knowledge sharing: Contribute to troubleshooting guides, runbooks, and internal documentation.
• Continuous improvement: Participate in retrospectives and lessons-learned sessions.
• Technical & professional development: Continuously develop your technical skills through training and hands-on experience.
• Travel: You may occasionally be required to travel globally to support Radiant initiatives.

📌 Required Qualifications

• Degree in Computer Science or a related STEM subject, or equivalent industry experience.
• 3–5+ years of experience in a customer-facing technical support or cloud operations role.
• Proven experience working with cloud, datacenter, and Linux environments.
• Strong foundation in Linux system administration.
• Strong problem-solving skills and the ability to troubleshoot complex technical issues under pressure.
• Excellent written and spoken communication skills (English), with the ability to explain technical concepts clearly.
• A proactive, customer-focused approach to problem-solving.

⭐ Desirable Experience

• Familiarity with IT service management practices (e.g. ITIL concepts).
• Previous experience with HPC or AI technologies.
• Experience with GPUs, InfiniBand, parallel storage, and AI orchestration software.

🎁 Benefits

Competitive salary and benefits package.

🛂 Visa & Eligibility

Eligibility to work in the UK is required.