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

Fluidstack; Austin (TX); On-site; USD 208,000 - 263,000; Full time

Job summary

Fluidstack is seeking a senior Rack Systems Architect to own the rack as a product for 150kW-class deployments: define power budgets, cooling architecture, interconnect topology, and serviceability. You will write interface control documents between rack and facility and lead EE, ME, and thermal engineers, running design reviews to catch faults before field deployment.

The role requires 10+ years in rack-scale architecture at hyperscalers or AI hardware companies, with a proven track record

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 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.

Responsibilities

• Own the rack as a product for 150kW-class 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-scale compute

System architecture

Lead engineers

Interface control documents

Dense liquid-cooled racks

NVL-class rack

Job description

Fluidstack is seeking a senior Rack Systems Architect to own the rack as a product for 150kW-class deployments: define power budgets, cooling architecture, interconnect topology, and serviceability. You will write interface control documents between rack and facility and lead EE, ME, and thermal engineers, running design reviews to catch faults before field deployment.

The role requires 10+ years in rack-scale architecture at hyperscalers or AI hardware companies, with a proven track record