FluidStack
Controls Engineer, R&D
About this role
Fluidstack seeks a Controls Engineer to design and implement control systems for novel cooling infrastructure supporting massive AI compute deployments. You'll own the complete control architecture for high-speed compressors, turbines, and thermofluids loops operating near critical points, from test rigs through production deployment at gigawatt scale.
What you'll do
- Design control architecture for compressor, motor drive, expansion turbine, and thermofluids loop systems
- Develop safety interlocks and fault handling for fluids operating near critical points with high consequences for failure
- Implement capacity control via variable-speed motors and turbines instead of throttling valves
- Validate control systems through hardware-in-the-loop testing before physical machine deployment
- Transition validated controls from test environment into production chillers with site BMS integration
- Create operational documentation and handoff procedures for production teams
What they're looking for
- Control logic design for rotating machinery
- Safety-critical interlock design and fault analysis
- Hardware-in-the-loop testing and simulation
- PID loop tuning and system identification
- Variable-frequency drives and high-speed motor control
- Refrigeration and thermodynamic cycle control
- Thermofluids fundamentals and critical point behavior
- Technical documentation and knowledge transfer
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FluidStack
FluidStack builds AI infrastructure at scale, developing data centers and warehouse operations designed to handle gigawatt-capacity compute deployment. The company is hiring for warehouse engineers, data center operations specialists, product engineers, and people leaders to support rapid infrastructure expansion across multiple sites.
- Website
- fluidstack.io
Likely interview questions
- Walk us through a control system you designed for rotating machinery—what was the first problem you hit when it ran, and how did you solve it?
- Tell us about a safety interlock you designed where failure had serious consequences. How did you justify every decision and prove it would work?