Mechanical and Thermal Engineer, Power Electronics
About The Position
Fluidstack is hiring a Mechanical and Thermal Engineer for its Product Engineering team, which builds power and cooling systems for gigawatt-scale AI data centers. The SST group is designing solid-state transformers as a core part of that power architecture. This role is responsible for the mechanical and thermal architecture of the solid-state transformer (SST) block, including its enclosure, busbars, cold plates, coolant loops, and packaging of megawatts of power electronics into a compact space. The engineer will address thermal management of high-voltage components, including transformers cooled through their insulation, while maintaining required creepage and clearance distances at tens of kilovolts. The role includes sizing liquid-cooling systems and validating thermal budgets against measured losses at full power. It also covers design for manufacture, service, transport, and outdoor deployment, as well as handing off engineering drawings, tolerances, and test fixtures to suppliers, test laboratories, and certification bodies.
Requirements
- Experience designing and shipping enclosures and cooling systems for high-power converters such as medium-voltage drives, inverters, solid-state transformers, traction systems, or EV fast chargers.
- Experience laying out high-voltage busbars and conductors to meet creepage and clearance requirements in a compact volume.
- Experience building liquid cooling for power electronics, from cold plates to heat exchangers, and matching thermal models to test data.
- Experience designing parts for volume manufacture with a contract manufacturer and resolving issues found on the production line.
- Experience designing hardware for outdoor or industrial environments, including dust, humidity, vibration, and shipping loads.
Nice To Haves
- Thermal and flow simulation experience, including CFD, Ansys Icepak, or COMSOL.
- Mechanical CAD experience with SolidWorks, Creo, or NX.
- Knowledge of insulation coordination standards such as IEC 60664 and UL 840.
- Knowledge of enclosure ratings such as NEMA and IP.
- Design for manufacture and assembly (DFM/DFA) experience.
Responsibilities
- Design the mechanical and thermal architecture of the SST block, including its enclosure, busbars, cold plates, coolant loops, and component layout.
- Develop thermal solutions for high-voltage components, including transformers cooled through their insulation, while maintaining creepage and clearance distances.
- Size liquid-cooling systems, including glycol loops, heat exchangers, and dielectric secondary loops.
- Validate the thermal budget against measured losses at full power.
- Design modules, enclosures, and assemblies for manufacture, service, transport, and outdoor sites.
- Create designs that technicians can service and contract manufacturers can build at scale.
- Hand off drawings, tolerances, and test fixtures to suppliers, the test lab, and the certification body.
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What This Job Offers
Job Type
Full-time
Education Level
No Education Listed
