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Controls Engineer, Thermofluids

Fluidstack· Development
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Hybrid (Austin, TX), Hybrid (New York, NY), Hybrid (San Francisco, CA), Hybrid (Los Angeles; CA), Hybrid (Seattle, WA)$210k - $260kFull-timePosted 1mo ago

About the role

Role focused on owning and delivering control architecture for Fluidstack’s thermofluids machines, including test rigs and production integration, with emphasis on safety interlocks, fault handling, capacity control, and hardware-in-the-loop validation for high-scale compute cooling systems.

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.

Qualifications

  • 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

Required:Control logic for rotating machineryInterlocks design and fault handlingHardware-in-the-loop (HIL) testingLoop tuning on live machinesDocumentation handover
Last updated Sep 22, 2026. Interested? Apply on the company site.
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Fluidstack builds civilization-scale infrastructure for AI

Fluidstack builds civilization-scale infrastructure for AI, delivering gigawatts of compute in 6 months. We're leading the deployment of Anthropic's $50B compute build out.

AI infrastructurecompute centershardwaresoftwarepowerdata centersAnthropicfrontier compute
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