Technical Architect (AI Infrastructure)

Location: London, UK; the role includes on-site deployment work in live data centres.

Company

hirify.global operates Hyperstack, a self-serve GPU cloud platform for high-performance AI, HPC, and compute-heavy workloads, powered by renewable energy and NVIDIA architecture.

What you will do

• Own each GPU cluster deployment as the single design authority from CTO handover through customer acceptance.
• Convert high-level designs and initial BOMs into build-ready low-level designs, hall layouts, rack elevations, P2P maps, and cable schedules.
• Design InfiniBand and Ethernet fabrics, power and redundancy systems, direct liquid cooling, CDUs, containment, and cabling for data-centre constraints.
• Validate BOMs before procurement and assess the impact of part substitutions.
• Hold OEMs and integrators accountable from FAT witness through on-site issue resolution.
• Create reference designs and reusable building blocks for future deployments.

Requirements

• Experience designing and delivering large-scale GPU or HPC clusters into live data centres, including being on site for the build.
• Deep practical knowledge of NVIDIA GB200/GB300 rack-scale systems and HGX H200/B200 platforms, including facility requirements.
• Cluster-scale InfiniBand and Ethernet fabric design, including topology, rail optimisation, oversubscription, cable selection, and optic selection.
• Physical infrastructure design covering power and redundancy, direct liquid cooling, CDUs, containment, and achievable cable lengths.
• Knowledge of part numbers, optional versus required components, and the ability to hold OEMs accountable for technical commitments.

Nice to have

• Factory integration and FAT experience, including responsibility for a dispatch gate.
• AI workload storage design using WEKA, VAST, DDN, Ceph, or similar technologies.
• Deployments across multiple geographies and data-centre operators, including sites requiring fit-out.
• Neocloud or hyperscale experience on compressed schedules.

Culture & Benefits

• Competitive salary with an annual discretionary bonus scheme.
• Employee wellbeing benefits, private medical insurance, enhanced pension scheme, and 25 days of holiday plus public holidays.
• Flexible working arrangements, remote or hybrid depending on the role and location.
• Ownership, autonomy, initiative, experimentation, and clear career progression in a high-growth company.
• Collaborative international culture based on trust, transparency, and ownership.