5+ years of experience writing control firmware for power converters
Proven ability to debug firmware using oscilloscopes and bench testing
Experience with resonant or dual active bridge converters
Familiarity with FPGA or DSP protection logic development
Proficient in hardware-in-the-loop or model-based design methodologies
Experience with version control and automated testing for firmware releases
Bonus: Knowledge of embedded targets for power control and industrial communication protocols
Responsibilities
Develop control firmware for solid-state transformer cells and blocks
Implement fast protection mechanisms for fault detection and response
Manage startup sequences and voltage reconfiguration processes
Integrate cell controllers with site control systems across isolation barriers
Validate firmware using hardware-in-the-loop testing before high-voltage deployment
Benefits
Commitment to pay equity and transparency
Opportunity to work on cutting-edge technology in AI data centers
Collaborative environment that values exceptional talent
Potential for career growth in a rapidly evolving field
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
Write the control firmware for every SST cell and block: modulation, closed-loop voltage and current control, and voltage sharing across dozens of series-stacked cells.
Build the fast protection path that detects a fault and shuts the converter down within microseconds, from sensing to safe state.
Sequence startup, precharge, cell bypass, and the reconfiguration of the output from 800 V to 1,500 V.
Connect cell controllers to the block master and the site control system across isolation barriers, with telemetry operators can act on.
Prove the firmware on hardware-in-the-loop rigs before it runs on a high-voltage prototype.
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 written control firmware that runs a power converter at full power, and debugged it on the bench with a scope in hand.
You've controlled resonant or dual active bridge converters, or balanced series-connected cells.
You've built protection logic in an FPGA or DSP that trips in microseconds and fails safe.
You've used hardware-in-the-loop or model-based design to catch bugs before they reached hardware.
You keep firmware in version control with reviews and automated tests, and can show the release history of something you shipped.
Bonus: Embedded targets for power control (TI C2000, Xilinx or Intel FPGAs). Model-based design (MATLAB/Simulink, PLECS). Hardware-in-the-loop platforms (Typhoon HIL, OPAL-RT). Industrial communication (CAN, EtherCAT, fiber links). Functional safety practice (IEC 61508, MISRA C).
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.
