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Fluidstack is building civilization-scale compute infrastructure for AI at unprecedented speed and scale. The company is targeting 10 GW of compute in 2027 and 30 GW in 2028, requiring rethinking of every layer of the stack from power acquisition through data center design and operation.
The Thermofluids R&D team is solving some of the most demanding engineering challenges in the industry: rejecting more than 10 gigawatts of heat, designing and building custom compressors and chillers that the merchant market cannot supply, and owning the full thermofluids problem across the fleet including working fluid cycles, heat exchangers, two-phase heat transfer, and thermal energy storage.
As Structural Engineer, you will own the structural analysis and design of high-speed rotating machinery and pressure-containing systems. Your responsibilities include:
- Structural analysis of compressor and chiller machines: impeller and rotor stress, casing and pressure containment, and load paths through packaged units
- Design of pressure-containing structures from first-principles calculation through fabrication and validation
- Rotordynamic and modal analysis alongside the turbomachinery engineer, covering critical speeds, whirl, and magnetic bearing interfaces
- Containment case design to ensure energetic failures at speed remain contained
- Design of test cell structures and fixturing to carry the article, drive, and loop under load
The role operates with full autonomy and end-to-end ownership. You will work with insane urgency, reason from first principles, and directly influence designs that will be built thousands of times at scale.
REQUIREMENTS:
- Demonstrated experience taking a pressure-containing design from calculation through fabrication and validation
- FEA experience on rotating hardware with correlation against strain gauge, spin-pit, or test data (not model-only validation)
- Ownership of containment or burst case design with ability to justify safety margins to stakeholders
- Experience working modal and critical-speed problems jointly with aerodynamics engineers early in design
- Sign-off experience on structures that were built and loaded, ideally with direct involvement in first-load testing
- Bonus qualifications: flight and propulsion structures experience, spin pit testing, burst margin analysis, rotordynamics and bearing dynamics, high-cycle fatigue and fracture on rotating hardware, pressure vessel design, Professional Engineer license
