xAI
Mechanical Engineer - Datacenter (Macrohard/Colossus)
About this role
Join SpaceXAI's data center engineering team to design and optimize thermal and fluid systems for next-generation AI facilities. As a mechanical engineer, you'll serve as the subject matter expert on HVAC, cooling, and fluid management systems, working across design, analysis, and manufacturing to build world-class data center infrastructure.
What you'll do
- Own thermal management and fluid systems including chillers, pumps, coolers, heat exchangers, and building pressurization across data center builds
- Perform CAD modeling and 3D design of fluid and HVAC systems, coordinating across engineering disciplines
- Conduct fluid analyses for pressure balance, component allowables, and consumables planning
- Collaborate with procurement, construction, and other teams to select and source equipment meeting timeline, cost, and performance requirements
- Ensure manufacturability of designs and work with production teams to establish reliable manufacturing processes
- Support testing, validation, and activation of data center systems
What they're looking for
- CAD modeling and design (REVIT preferred)
- Thermal management and cooling system design
- Fluid mechanics and pressure analysis
- HVAC systems and air handling
- Pumps, valves, heat exchangers, and fluid components
- Data acquisition and instrumentation (pressure transducers, thermocouples)
- Cross-functional coordination and communication
- Independent problem-solving
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xAI
xAI builds advanced AI infrastructure and systems, including the Grok model inference platform and Colossus GPU cluster. The company is hiring Mechanical, Electrical, and Facilities Engineers to design and maintain its data center operations, as well as Software Engineers to optimize high-performance inference systems and datacenter networking.
View all jobs at xAILikely interview questions
- Describe your experience designing and analyzing fluid systems such as pumps, chillers, or heat exchangers—what was your specific role and what metrics did you optimize for?
- Tell us about a time you had to deconflict your mechanical design with other engineering disciplines in a 3D environment. How did you approach the problem?