5-7 years of experience in designing enclosures and cooling systems for high-power converters.
Proven track record of shipping high-voltage busbars and conductors while adhering to creepage and clearance standards.
Experience in building liquid cooling systems for power electronics, including cold plates and heat exchangers.
Familiarity with designing parts for mass production and resolving manufacturing issues.
Knowledge of designing hardware for outdoor or industrial environments, considering factors like dust and vibration.
Bonus: Proficiency in thermal and flow simulation tools (CFD, Ansys Icepak, COMSOL) and mechanical CAD software (SolidWorks, Creo, NX).
Responsibilities
Design the mechanical and thermal architecture of solid-state transformer (SST) systems.
Develop effective cooling solutions for high-voltage components while maintaining safety standards.
Size and optimize liquid cooling systems, ensuring thermal efficiency against measured losses.
Create designs that facilitate easy manufacturing, servicing, and transportation of SST modules.
Prepare detailed drawings and specifications for suppliers and testing labs.
Benefits
Commitment to pay equity and transparency.
Opportunity to work on cutting-edge technology in AI data centers.
Collaborative environment that values exceptional talent and innovation.
Full Job Description
The Product Engineering Team
Product Engineering builds the power and cooling systems that let Fluidstack deliver gigawatt-scale AI data centers faster and denser than the grid-standard supply chain allows. The SST group is designing solid-state transformers as a core building block of that power architecture.
Examples of key problems the team is working on
Architect a medium-voltage solid-state transformer that can be manufactured, serviced, and scaled across gigawatt-scale campuses, not just demonstrated in a lab.
Define the interface between the SST and the MVDC distribution system, including protection, control boundaries, and fault behavior.
Build a semiconductor and magnetics supply strategy that survives a thin 10kV SiC market over a multi-year horizon.
Take converter hardware from topology selection through working prototypes on a schedule that data center construction actually depends on.
Role Scope
Design the mechanical and thermal architecture of the SST block: enclosure, busbars, cold plates, coolant loops, and a layout that fits megawatts of power electronics into a few cubic meters.
Get heat out of high-voltage parts, including transformers cooled through their insulation, while holding every creepage and clearance distance at tens of kilovolts.
Size the liquid cooling (glycol loops, heat exchangers, dielectric secondary loops) and close the thermal budget against measured losses at full power.
Design for manufacture, service, and transport: modules a technician can swap, enclosures rated for outdoor sites, and assemblies a contract manufacturer can build thousands of times.
Hand off drawings, tolerances, and test fixtures to suppliers, the test lab, and the certification body.
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 designed the enclosure and cooling for high-power converters (MV drives, inverters, SSTs, traction, or EV fast chargers) and shipped them.
You've laid out high-voltage busbars and conductors to meet creepage and clearance rules in a tight volume.
You've built liquid cooling for power electronics, from cold plates to heat exchangers, and matched your thermal models to test data.
You've designed parts for volume manufacture with a contract manufacturer and fixed what broke on the line.
You've designed hardware for outdoor or industrial sites: dust, humidity, vibration, and shipping loads.
Bonus: Thermal and flow simulation (CFD, Ansys Icepak, COMSOL). Mechanical CAD (SolidWorks, Creo, NX). Insulation coordination standards (IEC 60664, UL 840). Enclosure ratings (NEMA, IP). Design for manufacture and assembly (DFM, DFA).
