Rack Systems Architect, Technical Lead

Fluidstack

$160K — $190K *
Information Technology
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • 10+ years in system architecture of rack-scale compute at a hyperscaler, NVIDIA-ecosystem ODM, or AI systems company.
  • End-to-end ownership of rack as a product, including power budget and cooling architecture.
  • Experience in shipping dense liquid-cooled rack-scale products, preferably NVL-class or equivalent.
  • Leadership of EE, ME, and thermal engineers executing the architecture.
  • Ability to navigate trade-offs on shipping racks and handle associated pushback.
  • Proficient in writing interface control documents for independent boundary operations.
  • Strong knowledge of interconnect technologies, particularly copper vs optics at high data rates.

Responsibilities

  • Own the architecture and product management of 150kW-class liquid-cooled racks.
  • Write detailed interface control documents for seamless collaboration across teams.
  • Lead and mentor a team of engineers in execution of rack architectures.
  • Conduct thorough design reviews to identify and resolve faults early in the process.
  • Align technical and product timelines with accelerator vendor roadmaps and facility designs.

Benefits

  • Commitment to pay equity and transparency.
Full Job Description
The Rack Systems Team

Rack Systems owns the rack as a product: the unit of compute that Fluidstack designs, integrates, and deploys into gigawatt-scale AI data centers.

Examples of key problems the team is working on:
  • Architect 150kW-class liquid-cooled racks where power, thermal, weight, and interconnect budgets all bind at once and every tradeoff shows up somewhere else in the system.
  • Define and hold the interfaces between rack and facility so power, liquid, and network can each evolve without forcing a redesign of the other side.
  • Keep the rack roadmap ahead of accelerator vendor roadmaps, so the next generation of dense compute lands in facilities designed before that hardware existed.
  • Run a small engineering team with the review rigor of a large one, catching design faults before they reach integration.
Role Scope
  • Own the rack as a product for 150kW-class liquid-cooled deployments: architecture, power budget, cooling, interconnect topology, structure, and serviceability, with tradeoffs made explicitly and defended on the record.
  • Write and hold the interface control documents between rack and facility, precise enough that power, liquid, and network teams can each move independently without breaking the boundary.
  • Lead the rack EE, ME, thermal, and integration engineers, owning the architecture they execute and the technical calls that unblock them.
  • Run design reviews where a 7-person team catches what a 70-person team would, so faults die in review rather than in the field.
  • Align the rack roadmap with accelerator vendors and Fluidstack's facility architecture, so each rack generation lands in a facility built to receive it.
What We're Looking For

The below is a starting point. We always make space for exceptional people, so if you don't fit this role exactly, tell us where you would.
  • 10+ years in system architecture of rack-scale compute at a hyperscaler, NVIDIA-ecosystem ODM, or AI systems company.
  • You've owned a rack as a product end to end: power budget, cooling architecture, interconnect topology, weight, transport, and serviceability.
  • You've shipped dense liquid-cooled rack-scale products, NVL-class or equivalent.
  • You've led the EE, ME, and thermal engineers who executed your architecture, not just advised them.
  • You've traded real things away on a shipping rack and taken the pushback that came with it.
  • You write interface control documents that let both sides of a boundary move independently, and you've seen what happens when they don't.
  • You hold a defensible view on copper versus optics for scale-up interconnect at 200G+ per lane, and you can argue where the crossover sits.
  • Bonus: NVL-class rack programs, transport and seismic qualification, facility-side liquid cooling fluency, or direct engagement with accelerator vendor roadmaps.


We are committed to pay equity and transparency.

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