Electrical Engineer / Applied Physicist

Job description

**About the Company** Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we’re laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. **About the Role**One of the key unsolved challenges in cryopreservation is the rewarming problem: how do we rapidly and uniformly rewarm whole organs and, ultimately, whole bodies to restart cryopreserved biology? One of the key ingredients is building first-of-its-kind electrical systems for delivering high power into complex biological loads. We are looking for fast-moving, hands-on engineers and physicists with strong fundamentals, high autonomy, and a desire to build technology that feels impossible until it works. This role is for someone who is as comfortable deriving a back-of-the-envelope model from circuit laws, electromagnetics, and thermal physics as they are wiring up hardware in the lab. ### What You'd Do: - Design, build, test, and debug electrical hardware for organ rewarming systems. - Develop power converters, resonant matching networks, instrumentation, and control systems. - Reason from first principles, using circuit theory, electromagnetics, thermal physics and measurement data, to model system behavior and debug ambiguous hardware problems - Build test fixtures, data acquisition systems, experimental setups, and control software for high-power hardware validation. - Learn quickly, take ownership of ambiguous problems, and contribute across the full rewarming hardware stack. ### About You: - You have a strong command of circuit theory and physics (impedance, resonance, energy storage, electromagnetics, and heat transfer), and you reach for these instinctively when a piece of hardware isn’t behaving as expected. - You have a project you can walk us through in depth: not just what you built, but the physics and math reasoning that got you there, and where your first mental model was wrong. - You can make order-of-magnitude estimates quickly, and you can explain the physical intuition behind them clearly to someone else. - You’ve designed, built, and debugged real analog and digital circuitry, taking systems from schematic to bench and through bring-up. - You have experience with basic control systems, instrumentation, data analysis, and hands-on experimental hardware. - You have a BS/MS in EE, Physics, or equivalent self-taught depth; we care more about demonstrated reasoning ability than credentials. - You want to join a small, fast-paced team on an excellent adventure. ### Benefits: - Generous medical, dental and vision insurance coverage - Flexible time off and paid holidays - Competitive compensation package, including salary and equity - Access to a 401(k) retirement savings plan - FSA and commuter benefits - Daily lunch and dinners, plus a variety of snacks - Monthly learning stipend - On-site fitness center - Quarterly team social budget