Staff AI Systems Thermal Engineer

Location: San Jose, California, United States

Company

hirify.global develops semiconductor and infrastructure technology products.

What you will do

• Lead end-to-end thermal design, simulation, optimization, and physical validation of Direct-to-Chip liquid cooling solutions for AI accelerators and high-density compute platforms.
• Build CFD and thermal-resistance network models to evaluate temperature distribution, pressure drop, and flow balancing across cold plates, trays, and racks.
• Design and optimize liquid cold plates, coolant flow paths, quick-disconnects, hoses, manifolds, and retention mechanisms in alignment with server chassis and OCP standards.
• Research advanced cooling technologies and create integration and test plans for production deployment.
• Specify and qualify thermal interface materials for large, high-warpage devices.
• Plan and execute lab validation using thermal instrumentation, pressure and flow mapping, thermal test vehicles, and simulation-to-test correlation while collaborating with engineering and manufacturing teams.

Requirements

• Bachelor’s or Master’s degree in Mechanical or Thermal Engineering, or equivalent; an M.S. is preferred.
• Bachelor’s degree plus 8+ years of experience, or Master’s degree plus 6+ years of experience.
• Hands-on thermal or mechanical design experience for high-power electronics, AI hardware, servers, or HPC systems.
• Direct experience designing and deploying Direct Liquid Cooling systems, including liquid cold plates, coolant distribution units, and manifold loops.
• Deep understanding of single-phase and/or two-phase heat transfer, fluid dynamics, pressure-drop calculations, and electronics packaging interactions.
• High proficiency with CFD and thermal analysis software, preferably Flotherm, FloEFD, and MacroFlow.
• Experience with thermal data acquisition systems, flow meters, pressure transducers, and lab automation using Python, MATLAB, or LabVIEW.
• Experience with electronics packaging and CAD platforms; Creo experience is preferred.

Nice to have

• Experience with air-cooled systems.
• Master’s degree in Mechanical or Thermal Engineering.
• Creo experience.

Culture & Benefits

• Full-time onsite position in San Jose, California.
• Medical, dental, and vision plans; 401(k) participation with company matching.
• Employee Stock Purchase Program, Employee Assistance Program, paid holidays, paid sick leave, and vacation time.
• Discretionary annual bonus, competitive new-hire equity grant, and potential annual equity awards subject to applicable plans and agreements.
• Paid family leave and other legally applicable leaves of absence.

Hiring process

• First-time applicants must create a candidate login account before applying; existing candidates must sign in before applying.
• Applicants located outside the USA should provide a home address for future correspondence.