Mechanical Engineering, Design
until
Bay Area
Posted Jun 2, 2026
- Full-time
Job description
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** The hardware we need to accomplish our mission does not exist, so we must make it ourselves. As a mechanical engineer spearheading our mechanical design efforts, you'll be tasked with designing everything from heat exchangers to clinical grade perfusion devices. ### About You - Track record of exceptional engineering abilities, with an emphasis on shipping completed systems from sketch to final part with minimal outside direction - 3+ years experience/graduate level in Mechanical Engineering or equivalent - Highly proficient in DFM, CAD, FEA (Fusion 360 Preferred) - Highly proficient with common rapid prototyping and manufacturing processes (especially multiple additive methods, CNC machining and laser cutting) - Ability to spec a system based on first principles, design it, perform component selection, prototype, and then optimize for manufacturing - Desire to join a fast-paced, scrappy engineering team ### Preferred Qualifications - Class III Medical Device experience - Industrial Design & Engineering Experience