{"id":3048946,"url":"https://alion.io/job/until-labs-engineer-rewarming-systems","title":"Engineer, Rewarming Systems","company":{"id":686853,"name":"Until Labs","domain":"untillabs.com","url":"https://alion.io/company/untillabs","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":95,"open_postings":9,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":380,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":120000,"max":145000,"currency":"USD","period":"year","gross":null,"usd_annual":145000},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-10-22T00:13:52Z","employer_posted_date":"2026-10-22","last_verified_at":"2026-11-13T10:23:56Z","board_verified":true,"closed_at":null,"days_open":22,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":22},"description":"About the Company\nUntil 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.\nTo achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware.\nWe 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.\nAbout the Role\nOne of the key unsolved challenges in cryopreservation is the rewarming problem: how do we rapidly and uniformly rewarm whole organs and, ultimately, whole bodies to restart cryopreserved biology? Our high-power rewarming platform generates tens of kA/m at MHz frequencies, but that power only matters if it deposits the right amount of heat in the right places inside a vitrified organ. That happens at the interface between the platform and the biological sample, and this role owns it.\nWe are looking for fast-moving, hands-on engineers and physicists with strong fundamentals, high autonomy, and a desire to build technology that feels impossible until it works. This role is for someone who is as comfortable deriving a back-of-the-envelope model from electromagnetics, fluid dynamics, and heat transfer as they are building hardware and running experiments with real organs in the lab.\nWhat You'd Do\nDesign, build, and operate the hardware and software linking the rewarming system and the organ: holders, fluidic circuits, sensing, control, and data acquisition.\n\nRun experiments on holder designs and rewarming protocols alongside the organ and cryobiology teams.\n\nReason from first principles, using electromagnetics, heat transfer, imaging and measurement data, to model nanoparticle distribution and heating uniformity, then refine hardware and protocols.\n\nDevelop sensing, control, interlock, and logging software for field profiles and temperature feedback.\n\nLearn quickly, take ownership of ambiguous problems, and contribute across the full rewarming hardware stack.\n\nAbout You\n3+ years of hands-on engineering experience (student teams count), and a project you can walk us through in depth: the reasoning and where your first model was wrong.\n\nStrong command of electromagnetics, heat transfer, and fluid dynamics.\n\nMechanical design and fabrication experience (CAD, rapid prototyping, 3D printing, etc.).\n\nCircuit design experience from protoboard to PCB, plus building and debugging sensors, data acquisition, and control systems.\n\nProficient in object-oriented programming in Python and/or C++.\n\nEager to work closely with biologists (no biology background required).\n\nDesire to join a small, fast-paced team on an excellent 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