Mechanical Engineer, Modular R&D
Fluidstack· AI Infrastructure· Jul 17, 2026 · 3mo agoPosted 102 days ago
Austin, TX / Phoenix, AZ
In office
Full-time
Staff
$169K–$208K
8+ years exp
Before you apply
Ghost Signal:
Open since July 17, 2026 — 102 days, and still accepting applications.
Job description
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
- 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 you're going to spend your time, spend it on something that matters to the world.
THE MODULAR TEAM
Examples of key problems the team is working on
- Design the module that makes 6-month data centers possible. Fluidstack builds data centers in months, not years, and that speed lives in the modular product: a data center engineered as a manufactured unit, not a construction project.
- Take designs from concept to the manufacturing line in weeks. Concept, released drawings, first article, and rate production on a compressed schedule, with the factory building from your work the same month you release it.
- Engineer for the thousandth unit, not the first. On the way to 10s of GW, every drawing, tolerance, and BOM decision has to survive rate manufacturing, so repeatability is designed in from the start.
ROLE SCOPE
- Engineer the mechanical systems of the modular product: cooling, piping, and airflow from concept to released drawings.
- Own the liquid cooling loops, pumps, and heat rejection design the modular product's density depends on.
- Solve the integration problems where mechanical meets structure and electrical: routing, interfaces, and tolerances where the disciplines collide.
- Support the factory and field: mechanical RFIs answered same-day, fixes engineered into the next revision.
- Prototype and validate: mockups, fit checks, and first-article reviews you attend in person.
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 jobs.ashbyhq.com.
- 8+ years of experience in mechanical engineering for modular construction or complex physical products, including cooling, piping, and airflow systems from concept through released drawings.
- You've engineered mechanical systems for complex physical products or modular construction hands-on.
- Your drawings build clean: fabricators rarely call, and when they do you fix the drawing.
- You work across disciplines instead of throwing problems over walls.
- You've supported production launches of your own designs.
- You iterate fast without losing configuration control.
- Bonus: Liquid cooling depth. Sheet metal and piping design. 3D CAD mastery (SolidWorks, Inventor, Revit). DFM instincts.
Physical Requirements
- Work in non-climate-controlled environments, including active construction areas, data halls, electrical and mechanical rooms, and outdoor spaces. Temperatures can be high or low, and conditions can be humid, loud or dusty.
- Lift, carry, push and pull up to 40 pounds on your own.
- Sit, stand, walk, kneel, bend and crouch for long periods, including full shifts on your feet.
- Wear the required personal protective equipment (PPE), such as hard hats, safety glasses, steel-toed boots, gloves and hearing protection, and follow site safety rules.
- Climb stairs and ladders, and move around equipment, cable trays and uneven surfaces.
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.
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Keywords to mirror
ai
- Platform
- ashby
- Effort
- quick
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