Sr. Mechanical Engineer, Design

Job Description

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
• 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

While this represents our expected range based on market data, final compensation will be determined based on your specific qualifications and may be outside this range. Please keep in mind that the equity portion of the offer is not included in this estimate.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.