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 YouTrack record of exceptional engineering abilitiesDeep understanding of heat and mass transfer principlesExperience designing fluidic systems for perfusion/heat exchangersHigh degree of autonomy across full engineering stack: electromechanical design and fabrication, control software, physical modelingDesire to join a fast-paced, scrappy engineering teamPreferred Qualifications3+ years experience/graduate level in Mechanical Engineering, Physics, or equivalentExperience with organ perfusion in a research or clinical contextExperience working in a startupBenefitsOpportunity for outsized impact creating the future as an early team memberGenerous medical, dental and vision insurance coverage for employees and their dependentsFlexible time off and paid holidaysCompetitive compensation package, including salary and equityAccess to a 401(k) retirement savings planFSA and commuter benefitsSubsidized lunch dailyWhile 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.