Rack Systems Architect & Tech Lead — 150kW Liquid-Cooled

Fluidstack; Los Angeles (CA); On-site; USD 208,000 - 263,000; Full time

Job summary

Fluidstack in Los Angeles invites a seasoned Rack Systems Architect to own the 150kW-class liquid-cooled rack product. You will define power budgets, cooling, interconnects, weight, and serviceability, aligning with facility architecture and accelerator vendor roadmaps.

You will lead EE, ME, thermal, and integration engineers, run rigorous design reviews, and ensure the boundary between rack and facility moves smoothly.

Qualifications

• 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've written 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.

Responsibilities

• 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.

Skills

Rack architecture

System architecture

Interconnect topology

Technical leadership

Thermal engineering

Job description

Fluidstack in Los Angeles invites a seasoned Rack Systems Architect to own the 150kW-class liquid-cooled rack product. You will define power budgets, cooling, interconnects, weight, and serviceability, aligning with facility architecture and accelerator vendor roadmaps.

You will lead EE, ME, thermal, and integration engineers, run rigorous design reviews, and ensure the boundary between rack and facility moves smoothly.