Posted on:August 13, 2025
Sr. Mechanical Engineer, Fluidics/Perfusion at Until
Until is hiring a Sr. Mechanical Engineer, Fluidics/Perfusion in San Francisco, CA, US. On-site. Pay: USD 150k-210k/yr.
About Until
Until is developing reversible cryopreservation technology to preserve donated human organs at subzero temperatures without ice formation, then rewarm them for transplantation. The company aims to solve the donor organ procurement and matching problem, and is working toward whole-body reversible cryopreservation as a longer-term goal.
Sr. Mechanical Engineer, Fluidics/Perfusion 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
Accomplishing our mission requires skilled engineers pushing the boundary developing new systems for heat and mass transfer in N-of-1 perfusion and heat exchange devices. We're building a fast-paced, scrappy team of engineers to create technology indistinguishable from magic.
About You
Preferred Qualifications
Benefits
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.
