Engineer, Rewarming Systems

Until; San Francisco (CA); Presencial; USD 120.000 - 145.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Medical coverage

Dental coverage

Vision coverage

401(k) retirement plan

FSA benefits

Lunch and dinners

Learning stipend

On-site fitness

Team events

Descripción de la vacante

Until is a moonshot company building a pause button for biology, focusing on organ-scale reversible cryopreservation. This role owns the interface between a high-power rewarming platform and biological samples, driving hardware and software development for precise heat delivery.

We seek hands-on engineers and physicists who thrive on first-principles modeling and experimental work with real organs. Expect autonomy, rapid iteration, and collaboration across biology and engineering teams in a lab

Formación

• 3+ years of hands-on engineering experience (student teams count).
• Strong command of electromagnetics, heat transfer, and fluid dynamics.
• Mechanical design and fabrication experience (CAD, rapid prototyping, 3D printing).
• Circuit design from protoboard to PCB; build and debug sensors, data acquisition, and control systems.
• Proficient in Python and/or C++ (object-oriented).
• Willing to work with biologists; join a small, fast-paced team.

Responsabilidades

• Design, build, and operate hardware and software linking the rewarming system and the organ (holders, circuits, sensing, control, data logging).
• Run experiments on holder designs and rewarming protocols with organ and cryobiology teams.
• Model heating uniformity from first principles using electromagnetics, heat transfer, and imaging data.
• Develop sensing, control, interlock, and logging software for field profiles and temperature feedback.
• Take ownership of ambiguous problems and contribute across the rewarming hardware stack.

Conocimientos

Electromagnetics

Heat transfer

Fluid dynamics

Herramientas

CAD

3D printing

PCB design

Descripción del empleo

About the Company

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

One 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.

We 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.

What You'd Do

• Design, build, and operate the hardware and software linking the rewarming system and the organ: holders, fluidic circuits, sensing, control, and data acquisition.
• Run experiments on holder designs and rewarming protocols alongside the organ and cryobiology teams.
• Reason from first principles, using electromagnetics, heat transfer, imaging and measurement data, to model nanoparticle distribution and heating uniformity, then refine hardware and protocols.
• Develop sensing, control, interlock, and logging software for field profiles and temperature feedback.
• Learn quickly, take ownership of ambiguous problems, and contribute across the full rewarming hardware stack.

About You

• 3+ 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.
• Strong command of electromagnetics, heat transfer, and fluid dynamics.
• Mechanical design and fabrication experience (CAD, rapid prototyping, 3D printing, etc.).
• Circuit design experience from protoboard to PCB, plus building and debugging sensors, data acquisition, and control systems.
• Proficient in object-oriented programming in Python and/or C++.
• Eager to work closely with biologists (no biology background required).
• Desire to join a small, fast-paced team on an excellent adventure.

$120,000 - $145,000 a year

Benefits

• Generous medical, dental and vision insurance coverage
• 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
• Daily lunch and dinners, plus a variety of snacks
• Monthly learning stipend
• On-site fitness center
• Quarterly team social budget

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.