# Sr. Mechanical Engineer, Fluidics/Perfusion at until

- Company: until
- What the company does: Until is building a pause button for biology, so every single transplantable organ finds a recipient and saves a life. Backed by Founders Fund and Lux.
- Company website: https://www.untillabs.com
- Type: Startups
- Level: Senior
- Location: Bay Area
- Work setup: On-site
- Pay: $150K to $210K base salary per year (USD)
- Posted: 2025-08-13
- Apply by: 2026-10-08
- Apply: https://jobs.lever.co/until/b62fa357-ad95-4661-aa95-44738524e09a
- Page: https://www.1752.vc/careers/jobs/until-sr-mechanical-engineer-fluidics-perfusion/

## About the 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.

## What they're looking for

- Track record of exceptional engineering abilities
- Experience leading highly technical, multidisciplinary teams
- 3+ years experience/graduate level in Mechanical Engineering, Physics, or equivalent
- Deep understanding of heat and mass transfer principles alongside fluidic design experience
- High degree of autonomy across full engineering stack: electromechanical design and fabrication, control software, physical modeling
- Desire to join a fast-paced, scrappy engineering team

Tags: Engineering