Mechanical Engineer, Thermofluids

Required

• The below is a starting point. We always make space for exceptional people, so if you don't fit this role exactly, tell us where you would.
• 10+ years of experience in thermofluids engineering, including thermodynamic cycle modeling, heat exchanger design, and high-pressure fluid system design.
• You’ve built a thermodynamic cycle model from fluid properties up and defended its assumptions to someone actively trying to break it.
• You’ve sized real heat exchangers against published correlations, and you’ve caught a case where the correlation belonged to a different geometry than the one in front of you.
• You’ve calibrated a model against a machine datasheet or test data and reported the gap honestly rather than tuning until it disappeared.
• You’ve written the analysis that changed a design decision, in a form that people who never ran the code could read and act on.
• You’ve sized a relief path and been the one who signed off that the system was protected.
• You’ve held a result open when it was still open, instead of closing it early to be helpful.
• You're comfortable with regular travel: expect 25% or more, depending on business needs.
• Most of our engineering team, stakeholders, and work are based in Austin, TX, and we value working in person. We have a strong preference for Austin and run a hybrid model, but we're open to other locations for the right role and candidate.
• Bonus: Vapor-compression and transcritical cycles (chillers, heat pumps, refrigeration). Propulsion and cryogenic fluid systems (feed systems, regenerative cooling, two-phase transport). Piping and relief design for high-pressure fluid systems. Real-gas properties and two-phase heat-transfer correlations (CoolProp, REFPROP, Cavallini, Gnielinski, Wang). Data center thermal architecture (CDUs, dry coolers, direct-to-chip).
• We are committed to pay equity and transparency.