NexGen Cloud - HPC Cluster Architect

• Rather than a long checklist, here’s what success in this role looks like: • Own end-to-end cluster architecture for large-scale NVIDIA GPU deployments — from customer requirement through rack layouts, BOM, power and cooling design, to production handover • Design high-performance network fabrics across compute (InfiniBand, RDMA, NVLink/NVSwitch), storage, and WAN — defining topology, oversubscription models, and scaling strategies • Engage directly with OEMs and vendors — validating hardware configurations, reviewing quotes, and ensuring designs are both technically sound and commercially optimised • Provide technical oversight during deployment and bring-up — supporting hardware validation, performance testing, and acting as escalation point for complex integration issues • Act as a senior technical leader across Solutions Architecture, Cloud Engineering, and data centre partners — contributing to standardised reference designs and building out the HPC engineering function • We’re more interested in how you think and work than in a perfect CV. You’ll likely bring a combination of the following: • how you think and work • Essential • Deep hands-on knowledge of NVIDIA GPU platforms (H100/H200/B-series) and NVIDIA reference architectures • Strong InfiniBand/RDMA design experience — topology, performance tuning, and high-performance Ethernet fabrics • Solid grounding in Linux systems, PCIe topology, NUMA alignment, and server-level performance considerations • Background from an OEM, hyperscaler, neo-cloud, or enterprise/research HPC environment — with demonstrable exposure to the full design-to-deployment lifecycle • Confident engaging with customers, vendors, OEMs, and internal engineering teams as a technical authority — able to translate complex design trade-offs into clear decisions