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Until
Until

Mechanical Engineer, Fluidics/Perfusion

California, U.S.
Full-Time
On-site
$120,000 – $200,000 per year

TLDR

Build organ-scale perfusion systems and cryopreservation hardware enabling reversible biology breakthroughs for transplant medicine.

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 You

  • Track record of exceptional engineering abilities
  • Deep understanding of heat and mass transfer principles
  • Experience designing fluidic systems for perfusion/heat exchangers
  • 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

    • Preferred Qualifications

  • 3+ years experience/graduate level in Mechanical Engineering, Physics, or equivalent
  • Experience with organ perfusion in a research or clinical context
  • Experience working in a startup

    • Benefits

  • Opportunity for outsized impact creating the future as an early team member
  • Generous medical, dental and vision insurance coverage for employees and their dependents
  • 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
  • Subsidized lunch daily

    • Benefits

    Equity Compensation

    Competitive compensation package, including salary and equity

    Free Meals & Snacks

    Subsidized lunch daily

    Health Insurance

    Generous medical, dental and vision insurance coverage for employees and their dependents

    FSA and commuter benefits

    Paid Time Off

    Flexible time off and paid holidays

    Until
    Until

    Until is innovating in the field of biology with a focus on organ-scale reversible cryopreservation. We aim to preserve donated organs at subzero temperatures without ice formation, enabling them to be safely rewarming for transplant, while also working towards the larger goal of allowing patients to wait for future cures without losing the possibility of treatment. Our approach combines interdisciplinary expertise to forge solutions that could redefine the boundaries of medicine and organ transplant logistics.

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    Mechanical Engineer