Senior / Staff Power Electronics Engineer (Cryopreservation)

Location: Bay Area, United States; on-site

Company

hirify.global is developing organ-scale reversible cryopreservation technology to preserve donated organs at subzero temperatures and rewarm them uniformly for transplantation.

What you will do

• Own power electronics hardware development for rewarming systems from architecture and modeling through prototyping, validation, and iteration.
• Architect power converter topologies, high-Q resonant networks, impedance matching systems, and electromagnetic structures.
• Lead tradeoff studies across frequency, voltage, current, insulation, thermal management, manufacturability, and safety.
• Prototype, test, and debug high-voltage, high-current, MHz-frequency hardware and instrumentation in the laboratory.
• Design and safely operate laboratory infrastructure for validating high-energy systems.
• Collaborate with engineers, scientists, physicists, and cryobiologists on whole-organ and whole-body rewarming systems.

Requirements

• Deep understanding of power electronics, electromagnetics, and analog circuit design through both first-principles theory and practical implementation.
• At least 7 years of hands-on experience designing, building, and validating high-reliability, high-energy power systems, or an equivalent advanced degree and track record.
• Experience with high-frequency, high-voltage converter design, semiconductor selection including SiC and GaN, parasitic mitigation, impedance matching, shielding, and EMI/EMC.
• Strong laboratory skills with high-voltage, high-current, and high-bandwidth instrumentation, including safe bring-up and debugging of high-energy systems.
• Proficiency with simulation tools such as SPICE, PSIM, or ANSYS Maxwell for power-electronic, electromagnetic, and thermal modeling.
• Exceptional engineering judgment, autonomy, and experience across the full hardware stack.

Nice to have

• Experience with high-energy RF power delivery, impedance matching, plasma processing, RF generators, EV power converters, induction heating, or pulsed-power systems.
• Experience with medium-to-high-voltage isolation, creepage and clearance, dielectric materials, partial-discharge mitigation, breakdown testing, and arc-flash safety.
• Experience designing high-Q resonant tanks, matching networks, or high-power MHz-frequency systems.
• Experience with thermal design, liquid cooling, calorimetry, and multiphysics tradeoffs.
• Experience leading or mentoring multidisciplinary engineering teams.

Culture & Benefits

• Full-time, on-site role on a small, fast-paced interdisciplinary team.
• Medical, dental, and vision insurance.
• Flexible time off, paid holidays, and a 401(k) retirement savings plan.
• FSA, commuter benefits, daily meals, snacks, and a monthly learning stipend.
• On-site fitness center and quarterly team social budget.
• Competitive compensation package including salary and equity.