Rack Systems Architect, Technical Lead

We exist to make humanity more free. For most of human history you farmed or you starved. Technology gave people more time for the things they wanted to do instead of things they had to do. Powerful AI will be the biggest lever for human choice weve ever built - but only if models are aligned with what humanity actually wants. There are groups building AI who dont share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks it.

Were singularly focused on delivering 10 to 100s of GWs of compute faster than anyone else rethinking every layer of the stack. We acquire power design and build data centers and operate them - with teams spanning hardware and software. Speed and scale are our key differentiators. Come be a part of building civilization-scale infrastructure for AI.

We hire people who care deeply about this problem space. If that is you please apply!

• Be a barrel. Full autonomy. Own things end to end take on scope without being asked no permission required to operate outside your core role.

• Insane urgency. We drive everything forward as fast as possible.

• Reason from first principles. Challenge every assumption. Zero analogy thinking no egos the best idea wins.

• Love of the game. The frontier of AI is the most interesting problem of our time. We put in long hours at high intensity to push the frontier forward.

• Build something that actually matters. If youre going to spend your time spend it on something that matters to the world.

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.

• 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 Fluidstacks facility architecture so each rack generation lands in a facility built to receive it.

The below is a starting point. We always make space for exceptional people so if you dont 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.

• Youve owned a rack as a product end to end: power budget cooling architecture interconnect topology weight transport and serviceability.

• Youve shipped dense liquid-cooled rack-scale products NVL-class or equivalent.

• Youve led the EE ME and thermal engineers who executed your architecture not just advised them.

• Youve 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 youve seen what happens when they dont.

• 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.

Fluidstack is an Equal Employment Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race color religion sex national origin sexual orientation gender identity disability and protected veterans status or any other characteristic protected by law. Fluidstack will consider for employment qualified applicants with arrest and conviction records pursuant to applicable law.

You will receive a confirmation email once your application has successfully been accepted. If there is an error with your submission and you did not receive a confirmation email please email with your resume/CV the role youve applied for and the date you submitted your application-- someone from our recruiting team will be in touch.

Required Experience:

Senior IC