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About the Role
We are seeking individuals who care deeply about our mission to make humanity more free by delivering civilization-scale infrastructure for AI. This role focuses on owning the control architecture for machines and test rigs, including safety interlocks and fault handling, and delivering capacity control through motor and turbine speed.
Responsibilities
- Own the control architecture for the machine and the test rigs, spanning the compressor, the motor drive, the expansion turbine and the loop around them.
- Write the safety interlocks and fault handling for a machine whose working fluid can cross its critical point inside the normal operating range, taking the control problem with it.
- Deliver capacity control through motor and turbine speed rather than throttling valves, keeping the process fluid path free of valves at the design point.
- Validate the control system against hardware-in-the-loop before it ever touches the real machine, and prove the interlocks fire.
- Carry the controls out of the test cell and into the production chiller, including integration with site BMS and the wider plant.
Requirements
- You’ve written control logic for rotating machinery and you were in the room the first time it ran.
- You’ve designed interlocks where a fault means destroyed hardware or an injured person, and you can justify every one of them from first principles.
- You’ve run hardware-in-the-loop testing that caught something real before it reached commissioning.
- You’ve tuned loops on a live machine and worked out why the model and the plant disagreed.
- You’ve handed a control system to people who did not write it, with documentation they could actually use at three in the morning.
Skills
- Propulsion or vehicle test controls (engine sequencing, abort and safing logic).
- Variable-speed drives and high-speed motor control (VFDs, magnetic bearing controllers).
- Refrigeration and chiller control (superheat, head pressure, capacity staging).
- Industrial control platforms (Beckhoff, Siemens, Allen-Bradley, CODESYS).
- Model-based development and HIL (Simulink, dSPACE, NI VeriStand).
About the Company
- Fluidstack exists to make humanity more free by delivering 10 to 100s of GWs of compute faster than anyone else, rethinking every layer of the stack.
- We acquire power, design and build data centers, and operate them - with teams spanning hardware and software.
- Speed and scale are our key differentiators.
- We are building civilization-scale infrastructure for AI.
- We hire people who care deeply about this problem space.
- Our operations are characterized by autonomy, extreme urgency, first-principles reasoning, passion for the problem, and a focus on building something that matters.
Equal Opportunity
- Fluidstack is an Equal Employment Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability and protected veterans’ status, or any other characteristic protected by law.
- Fluidstack will consider for employment qualified applicants with arrest and conviction records pursuant to applicable law.