Turbomachinery Engineer (AI Infrastructure)

Location: Hybrid in Austin, TX; Los Angeles, CA; New York, NY; San Francisco, CA; or Seattle, WA

Salary: $210,000–$260,000 USD annually, plus equity

Company

hirify.global develops and operates large-scale compute infrastructure for frontier AI, including power systems, data centers, hardware, and software.

What you will do

• Own the aerodynamic design of centrifugal compressors from mean-line and 1D analysis through CFD and released impeller, diffuser, and return-channel geometry.
• Define machine architecture, including stage count, shaft speed, diameter, working fluid, and bearing approach.
• Design expansion turbines that recover shaft work from high-side pressure drops.
• Collaborate with structural and mechanical engineers on rotordynamics, magnetic-bearing integration, and shaft stress at high speeds.
• Run machines on test stands and use measured performance maps to improve the aerodynamic design.
• Develop thermofluids systems for AI data-center cooling at 10–30 GW scale, including compressors, chillers, heat exchangers, two-phase heat transfer, and thermal energy storage.

Requirements

• Experience designing a radial or axial turbomachine that was built and operated.
• Experience taking a stage from mean-line analysis through CFD and validating the results against physical performance.
• Experience resolving rotordynamics problems on real shafts and bearings.
• Experience making early machine-architecture decisions with incomplete data and carrying them through build and test.
• Ability to interpret test maps and change the design based on measured performance.
• Experience working in a rapid build-and-test engineering environment.

Nice to have

• Experience with turbopumps, gas turbines, cryogenic turbomachinery, launch vehicles, APUs, or aero engines.
• Experience with high-speed motor-driven compressors, magnetic bearings, hermetic or oil-free machines.
• Experience with transcritical or supercritical working fluids, including R744 or sCO2 cycles.
• Experience with CoolProp, REFPROP, vapor-compression machines, chillers, heat pumps, or industrial refrigeration.

Culture & Benefits

• Full autonomy and end-to-end ownership.
• Fast-paced work focused on first-principles reasoning and rapid execution.
• High-intensity collaboration on frontier AI infrastructure.
• Full-time compensation includes base salary, equity, and benefits.
• hirify.global is committed to pay equity and compensation transparency.