Power Electronics Engineer

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 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 SST cell and block in detail: converter implementation, component selection, magnetics interface, and loss and thermal budgets for a 5 MW block on a medium-voltage DC bus.
• Simulate, build and bring up the first cell prototypes with the PCB, firmware and test engineers, and debug them at full voltage and power.
• Turn the program's architecture decisions into a buildable design: schematics, design calculations, and the technical sections of the SST specification.
• Test vendor hardware and data against your own models, and give the program lead the technical evidence behind each make, co-develop or buy call.
• Carry the design through cell, block and pilot-unit design reviews, closing every open loss, thermal and insulation item before the next build.

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 hands-on developed and validated high-power or medium-voltage power converters at the lab bench, going far beyond writing technical requirements.
• You've engineered isolated DC-DC converters utilizing 1.7 kV+ SiC devices and can rigorously justify your efficiency calculations.
• You've guided conversion systems from initial simulation models through hardware bring-up and full qualification testing.
• You've collaborated directly across PCB, controls, and magnetics domains to balance architectural trade-offs across the unit.
• You've identified hardware bugs during bench evaluation and resolved them in subsequent board iterations.
• Bonus: Solid-state transformer products. Resonant converter topologies (DAB, LLC, CLLC). Circuit simulation. SiC voltage derating. Power conversion safety standards.

We are committed to pay equity and transparency.