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Data Center Architect

Radiant
Contract type
Ongoing
Work mode
Hybrid · United Kingdom
Experience
Senior · 8+ years

Job description

A senior individual contributor role acting as the single technical authority between Radiant's GPU-as-a-service business and its colocation providers. The architect turns cluster and OEM requirements into contractable statements of work for data centre white space and holds providers to them through design, installation and acceptance.

At a glance

Employment
Full-time · Employee (employment agreement)
Work mode
Hybrid · United Kingdom

What you'll do

  • Lead technical due diligence on candidate sites: power availability and energisation dates, redundancy topology, liquid-cooling capability, floor loading, rack logistics, fibre and meet-me access
  • Negotiate the technical schedules of the colocation agreement with commercial and legal: capacity and density commitments, power and cooling SLAs, temperature and flow envelopes, metering, expansion rights, change control and remedies
  • Challenge provider claims with evidence: single-line diagrams, P&IDs, load-bank and commissioning records, reference customers
  • Work with cluster architects and OEMs (NVIDIA first) to capture rack, power, cooling, network and layout requirements, and keep them current across product generations
  • Write and own the technical SOW for white-space fitout: containment and cooling interfaces, power distribution to rack, structured cabling and pathways, rack and POD layout, security zoning, labelling and records
  • Define clear scope boundaries and responsibilities between us, the colocation provider, OEMs and installation contractors, with no gaps and no overlaps
  • Maintain a requirements baseline with traceability from OEM document, to SOW clause, to acceptance test
  • Review provider and contractor designs, shop drawings and method statements against the SOW; run design reviews and close findings
  • Define acceptance: factory and site tests, liquid flush and cleanliness, power quality, thermal performance at full load, fibre loss, burn-in, and the evidence pack needed for each gate
  • Attend key witness tests and sign off, or reject, completion of each phase before hardware is energised
  • Manage technical change requests and variations, and advise on cost and schedule impact
  • Build reusable reference designs, SOW templates and a site-scoring framework so each new deployment starts from a proven baseline
  • Track the roadmap: higher rack densities, 800 VDC distribution, new cooling classes and optics, and tell the business early what it means for sites already contracted

What we're looking for

  • 8 or more years in data centre design, delivery or technical consulting, including at least 3 years on high-density (50 kW per rack or more) or liquid-cooled deployments
  • Direct experience writing or reviewing technical specifications and SOWs for white-space fitout, and managing contractors against them to acceptance
  • Strong working knowledge of data centre power: MV and LV distribution, UPS and generator topologies, redundancy models (N+1, 2N, distributed), busway and rack power, metering and power quality
  • Strong working knowledge of cooling: direct-to-chip liquid cooling, CDUs, facility and technology loops, warm-water and dry-cooler designs, fluid quality and flushing, leak detection and containment
  • Working knowledge of structured cabling and pathways for large GPU fabrics (single-mode optics, high fibre counts, InfiniBand and Ethernet physical layers), and of rack and POD layouts
  • Familiarity with NVIDIA rack-scale platforms (GB200 or GB300 class, or later) and their facility requirements, and the ability to read OEM site-requirement documents critically
  • Proven ability to run technical negotiations with colocation or construction counterparties, and to explain trade-offs to commercial, legal and executive audiences
  • Command of standards such as EN 50600 and the Uptime Tier framework, ASHRAE TC 9.9 liquid-cooling guidance, and commissioning practice (levels 1 to 5)
  • Excellent written communication: you produce clear, unambiguous contract-grade documents

Nice to have

  • Experience at a hyperscaler, neocloud or colocation provider on the operator or customer side
  • Experience with 800 VDC or other DC distribution, large battery storage, or power smoothing for AI load swings
  • Chartered engineer status or equivalent; recognised data centre credentials (for example CDCP, CDFOM, Uptime ATD or AOS)
  • Familiarity with BIM, digital-twin tools and requirements-management tools
  • Willingness to travel up to 30% to sites in the UK, Europe and the US

Your team

Data Centre Development

Reports to the Head of Data Centre Development; works with cluster and network architects, OEMs (mainly NVIDIA), colocation providers, and internal Procurement, Legal, Finance and Site Operations teams.

How to get hired

  1. 1Talent Screening
  2. 2Hiring Manager Screen
  3. 3Technical Interview
  4. 4Final with the Head of Data Centre Development

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About Radiant

Redefining how AI infrastructure is built

Radiant designs and operates AI-native cloud platforms engineered for sovereignty, performance, and scale. Its infrastructure powers GPU-native workloads, multi-tenant control planes, and high-performance AI systems. The company is building purpose-built AI infrastructure — from powered land, to compute, to software — and is building the organisation from the ground up.

Mission

We design and operate AI-native cloud platforms engineered for sovereignty, performance, and scale.

Key facts

  • AI infrastructure / cloud
  • Designs and operates AI-native cloud platforms engineered for sovereignty, performance, and scale
  • Infrastructure powers GPU-native workloads, multi-tenant control planes, and high-performance AI systems
  • Building purpose-built AI infrastructure from powered land, to compute, to software
  • Growing from tens of megawatts to hundreds, on rack-scale liquid-cooled platforms at 130 kW per rack and rising to 200 kW and beyond
  • Startup model: attitude and adaptability matter more than years of experience or size of team previously managed

Partners & customers

NVIDIA

What they value

  • Set the standard
  • Inspire the change
  • You're real and you're true to yourself
  • Get stuck in