5-7 years of experience in designing high-frequency transformers or inductors for power converters.
Hands-on experience with insulation design for medium-voltage magnetics and conducting hi-pot and partial-discharge tests.
Proficient in using FEA tools to predict losses and analyze thermal performance.
Experience in managing heat dissipation in winding insulation systems without causing partial discharge.
Track record of taking magnetic components from prototype to volume production with external suppliers.
Ability to troubleshoot and identify root causes of failures in insulation, core, or winding.
Bonus: Familiarity with advanced core materials and transformer standards.
Responsibilities
Design medium-frequency transformers for SST cells, focusing on kilowatt capacity and high voltage insulation.
Select core materials and winding structures that optimize performance across production scales.
Conduct rigorous testing on designs, including hi-pot and thermal-cycling tests, to ensure quality standards.
Collaborate with vendors on transformer designs and validate insulation margins before production.
Transform designs into manufacturable parts, ensuring compatibility with supplier capabilities.
Benefits
Full autonomy in your role, encouraging ownership and initiative.
Fast-paced work environment that prioritizes urgency and efficiency.
Opportunity to work on groundbreaking AI technology that has a significant impact.
Collaborative culture that values the best ideas, regardless of hierarchy.
Commitment to meaningful work that contributes positively to the world.
Full Job Description
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 medium-frequency transformer at the heart of every SST cell: hundreds of kilowatts at tens of kilohertz, insulated for tens of kilovolts DC to ground.
Choose core materials, winding structures, insulation, and liquid cooling that balance loss, size, and cost across thousands of units.
Prove each design on the bench with hi-pot, partial-discharge, impulse, and thermal-cycling tests, and set the acceptance tests every production unit must pass.
Review vendor transformer designs during co-development and sign off on their insulation margins before we commit to volume.
Turn the design into a part a supplier can wind, pot, and test at volume, and qualify a second source.
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 and built high-frequency transformers or inductors for power converters at tens to hundreds of kilowatts.
You've designed insulation for medium-voltage magnetics and run hi-pot, partial-discharge, and basic impulse tests yourself.
You've used FEA to predict losses, leakage inductance, and hot spots, then matched those predictions to measured data.
You've pulled heat out of a winding through its insulation system, by cold plate or liquid, without creating partial discharge.
You've taken a magnetic component from prototype to volume production with an outside supplier.
You've traced a test or field failure to its root cause in the insulation, core, or winding.
Bonus: Core materials (nanocrystalline, ferrite). Solid and cast insulation (epoxy, silicone potting). Magnetics FEA (ANSYS Maxwell, COMSOL). Integrated leakage design for resonant converters (LLC, DAB). Transformer and insulation standards (IEC 61558, UL 1446).
We are committed to pay equity and transparency.
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 [redacted] 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.
