Mechanical Engineering, Design

Until

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Bay Area on site Until 8/22/2026 3+ years exp First posted June 3, 2026 Last posted June 3, 2026
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

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



As an equal opportunity employer, Until is committed to providing employment opportunities to all individuals. All applicants for positions at Until will be treated without regard to race, color, ethnicity, religion, sex, gender, gender identity and expression, sexual orientation, national origin, disability, age, marital status, veteran status, pregnancy, or any other basis prohibited by applicable law.

Compensation (from employer):
120000–170000 USD per year

About this role

Summary

Design and develop cryopreservation hardware, heat exchangers, and perfusion devices from concept to manufacturing.

Job title

Mechanical Engineering, Design

Experience level

3+ years

Minimum experience

3+ years exp

Industry

medical device

Location requirements

Bay Area residents optionally remote work allowed

Salary

$120k–$170k

Management role

No

Skills & keywords

Required skills

DFMCADFEAadditive manufacturing

Preferred skills

medical device experienceindustrial design

Specializations

mechanical designDFMCADFEAadditive manufacturing
Locations

Structured locations inferred from the posting.

Unknown location

Hybrid
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