NScale is the GPU cloud engineered for AI. We provide cost-effective, high-performance infrastructure for AI startups and enterprises. Our platform reduces the complexity of AI development, empowering our customers to achieve faster innovation and better outcomes.

Our mission is to enable the AI breakthroughs of tomorrow by delivering exceptional infrastructure today. At NScale, we’re builders at heart — driven by ownership, innovation, and urgency.

About the Role

We're looking for a Senior HPC Support Engineer to join our fast-growing team, focused on enabling and optimising HPC and AI workloads on GPU-accelerated infrastructure.

You’ll work directly with customers solving some of the most complex problems in AI, helping them troubleshoot and optimize performance in compute-intensive, distributed environments.

This is a hands-on role requiring deep technical acumen, exceptional problem-solving ability, and comfort working across a diverse set of technologies including GPUs (NVIDIA and AMD), InfiniBand networking, and orchestration systems like Slurm.

What You’ll Be Doing

• Provide expert-level support for customer HPC and AI workloads running in production.
• Troubleshoot complex system-level issues across networking, storage, containers, and GPUs.
• Collaborate with engineering and vendor partners to resolve hardware/software compatibility and performance issues.
• Analyse distributed workloads and assist with tuning of MPI-based applications.
• Develop internal tools and automation to improve support workflows.
• Contribute to documentation and knowledge-sharing initiatives.
• Participate in on-call rotations to support high-priority incidents and escalations.

About You

Skills & Experience

• Proven experience supporting HPC and/or AI workloads in production environments.
• Strong expertise with Slurm workload manager, including tuning and troubleshooting.
• Proficiency with system-level debugging, including kernel modules and network interfaces.
• Experience with GPU compute platforms (NVIDIA and/or AMD) and associated libraries.
• Familiarity with MPI libraries (e.g., OpenMPI), InfiniBand, and high-speed Ethernet networking.
• Solid Linux administration skills and troubleshooting experience.
• Working knowledge of HPC container runtimes (e.g., Singularity, Apptainer).
• Exposure to provisioning and automation tools (e.g., Ansible, PXE, Terraform).
• Experience with monitoring tools such as Prometheus, Grafana, and DCGM.
• Understanding of GPU/accelerator toolchains like CUDA or ROCm.
• A proactive, customer-first mindset with strong communication skills.
• Ability to work effectively in both individual and team settings.
• Comfort operating in fast-paced, ambiguous, high-growth environments.

Nice to have

• Experience with OpenStack and troubleshooting infrastructure in cloud environments.
• Kubernetes expertise, particularly in HPC or AI workload contexts.
• Familiarity with distributed file systems and advanced storage configurations.
• Understanding of GPU virtualization and multi-tenant HPC architecture.
• Exposure to machine learning frameworks and AI optimization workflows.
• Scripting skills in Python, Bash, or similar for automation and tooling.

Personal Attributes

• Proactive and self-motivated, with a strong sense of ownership.
• Thrives in a fast-paced, dynamic, and high-growth environment.
• Collaborative team player with a passion for delivering outstanding candidate and stakeholder experiences.
• Strong attention to detail and documentation skills.
• Excellent communication skills, both written and verbal.
• A self-starter mindset with a “see a problem, fix a problem” mentality.
• Experience in designing and implementing processes to optimize deployment workflows.

Please Note:

At this time, we are unable to offer visa sponsorship, so candidates must have the right to work in the UK. This may change as our hiring policies evolve.

We're currently working remotely, but plan to transition to a hybrid working model in 2025 as we look to secure a modern office space in London.

In all we do, our core values guide us;

Relentless Innovation

Ownership and Accountability

Openness and Transparency

Customer-Centric

Sustainability

Full-Speed Collaboration

Equal Opportunity

ties StatementAt Nscale, we are committed to fostering an inclusive, diverse, and equitable workplace. We welcome applications from individuals of all backgrounds, experiences, and perspectives. We strongly encourage applications from people of colour, the LGBTQ+ community, people with disabilities, neurodivergent people, parents, carers, and people from lower socio-economic backgrounds.