Sr. Mechanical Engineer, Design

Category

Engineering

Work Type

On-site

Employment

Full-time

Location

Bay Area

Salary Range

$145,000 - $210,000

per year

Posted on October 17, 2025

About This Role

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
  • 6+ 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 optimize for manufacturing
  • Desire to join a fast-paced, scrappy engineering team
  • Preferred Qualifications

  • Experience leading highly technical, multidisciplinary teams
  • Class III Medical Device experience
  • Industrial Design & Engineering Experience
  • Ready to Apply?

    Join our team and be part of the future of medicine and technology.

    Apply for Sr. Mechanical Engineer, Design