About Fluidstack

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 we've ever built - but only if models are aligned with what humanity actually wants. There are groups building AI who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks it.

We're 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!

How We Operate

• Extreme ownership. Full autonomy. Own things end to end often taking on scope outside your core role without being asked to get things done.

• Velocity. We drive everything forward as fast as possible.

• 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.

The Data Center Design Team

Examples of key problems the team is working on:

• Lead the design, development, and execution of 10s to 100s of GWs of data centers this decade.

• Drive the next generation of liquid cooling and electrical distribution systems.

• Develop and scale first-of-a-kind modular data centers.

• Influence behind-the-meter designs and planning for multi-GW campuses.

Role Scope

• Define and own Fluidstack's mechanical cooling strategy across the portfolio, from chip-level thermal interfaces through CDU and coolant distribution, chilled water plants, and heat rejection.

• Own the mechanical basis of design, master specs, standard drawings, and sequences of operation for every cooling system.

• Drive the architectural calls: coolant chemistry, chiller topology (air-cooled vs. water-cooled centrifugal), CDU elimination, medium-voltage chiller integration, and free cooling for best-in-class PUE and WUE.

• Define modular, prefabricated mechanical assemblies (containment cooling units, chiller skids, pump packages, piping modules) built for rapid deployment with minimal field interfaces.

• Own mechanical design delivery across multiple concurrent programs from concept through IFC, enforcing quality at each milestone and coordinating external MEP consultants.

• Build and manage the mechanical engineering team, and hold chiller, pump, and coolant vendors accountable on lead time, quality, and performance.

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.

• You've owned mechanical cooling design for hyperscale or high-performance data centers, from basis of design through commissioning.

• You have deep command of chilled water systems, air- and water-cooled chillers, direct liquid cooling, and heat rejection plant design at high rack densities (75 to 150+ kW/rack).

• You've built and led a mechanical engineering team and directed external MEP consultants through a full design lifecycle.

• You've developed and enforced design standards and master specs across a multi-site portfolio, not just delivered a single building.

• You've worked owner/developer-side with direct accountability for system performance, not just consultant or EPC scope.

• Bonus: PE license or Chartered Engineer. CFD (6SigmaET, Ansys Icepak, Flotherm) and Revit/BIM. Medium-voltage and 800VDC chiller applications. ASHRAE TC 9.9.

Benefits

• Competitive total compensation package (cash + equity).

• Retirement or pension plan, in line with local norms.

• Health, dental, and vision insurance.

• Generous PTO policy, in line with local norms.

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 careers@fluidstack.io with your resume/CV, the role you've applied for, and the date you submitted your application-- someone from our recruiting team will be in touch.