Mechanical Engineer, Data Center Engineering & Design

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.

Role Scope

Own mechanical systems end to end for AI-optimized, high-density data centers, from early concept and analytical modeling through final build and deployment.
Lead the design and evolution of mechanical and cooling systems as Fluidstack scales to multiple gigawatts.
Develop and maintain modular mechanical templates that enable rapid, repeatable global deployment.
Serve as the technical interface between internal teams and external consultants, keeping designs aligned with Fluidstack's high-density cooling and power requirements.
Design with supply chain and constructability in mind, not in a vacuum.
Want full ownership of the mechanical lifecycle at gigawatt scale.

What We're Looking For

• You've owned mechanical design for data centers or high-density facilities, from concept and modeling through build.
• You design cooling systems for AI-class density (chilled water, CDUs, direct liquid cooling) and think in modular, repeatable templates.
• You manage external consultants and act as the technical bridge to internal strategy.
• You design with supply chain and constructability in mind, not in a vacuum.
• You want full ownership of the mechanical lifecycle at gigawatt scale.
• Bonus: PE license. Direct-to-chip or liquid cooling design. Modular or prefab template programs. CFD (6SigmaET, Icepak). ASHRAE TC 9.9.

Benefits

• Competitive total compensation package (salary + equity).
• Retirement or pension plan, in line with local norms.
• Health, dental, and vision insurance.
• Generous PTO policy, in line with local norms.

Salary Range

The salary range for this position is $200,000 - $250,000 per year, depending on experience, skills, qualifications, and location. This range represents our good faith estimate of the compensation for this role at the time of posting. Total compensation may also include equity in the form of stock options. We are committed to pay equity and transparency.