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Turbomachinery Engineer, Thermofluids

Fluidstack· Development
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Hybrid (Austin, TX), Hybrid (San Francisco, CA), Hybrid (Los Angeles; CA)$210k - $260k + equityFull-timePosted 1mo ago

About the role

Role focused on aerodynamic design and integration of turbomachinery for high-scale thermofluids applications, including centrifugal compressors and expansion turbines, with hands-on testing and cross-disciplinary collaboration.

Responsibilities

  • Own the aerodynamic design of the centrifugal compressor, from mean-line and 1D through CFD to released impeller, diffuser and return-channel geometry.
  • Set the machine architecture, including stage count, shaft speed and diameter, while the working fluid decision is still open and moves the answer substantially.
  • Design the expansion turbine that recovers shaft work from the high-side pressure drop, sharing a shaft with the compressor and the motor instead of throwing that energy away across a valve.
  • Carry the rotor through rotordynamics, magnetic bearing integration and stress with the structural and mechanical engineers, at the shaft speeds a compact high-speed machine demands.
  • Take the machine onto the test stand, and close the loop from a measured performance map back into the aerodynamic design.

Qualifications

  • You’ve designed a radial or axial turbomachine that got built and ran, and you were standing next to it when it did.
  • You’ve taken a stage from mean-line through CFD and back, and you know the conditions under which your CFD is lying to you.
  • You’ve worked a rotordynamics problem through to resolution on a real shaft with real bearings, not just in a report.
  • You’ve made an architecture call early with incomplete data, stage count or speed or bearing type, and lived with it through build and test.
  • You read a test map and change the design, rather than explaining why the map is wrong.
  • You’ve worked somewhere the next article was already in the shop before the last one came off test, and you preferred it that way.
  • Bonus: Turbopumps, gas turbines and cryogenic turbomachinery (launch vehicles, APUs, aero engines). High-speed motor-driven compressors (magnetic bearings, hermetic, oil-free machines). Transcritical and supercritical working fluids (R744, sCO2 cycles). Real-gas property libraries (CoolProp, REFPROP). Vapor-compression machine design (chillers, heat pumps, industrial refrigeration).

Skills

Required:Centrifugal compressor designCFD analysisRotordynamics and magnetic bearing integration

Benefits

  • Equity
  • Base pay plus equity for all full-time roles
  • Benefits package
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.

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