Electrical Engineer / Applied Physicist
About the job
- Strong command of circuit theory and physics, including impedance, resonance, energy storage, electromagnetics, and heat transfer.
- A project that demonstrates in-depth understanding of what was built, the physics and mathematical reasoning behind it, and how an initial mental model was corrected.
- Ability to make order-of-magnitude estimates quickly and explain the underlying physical intuition clearly.
- Experience designing, building, and debugging real analog and digital circuitry from schematic through bench bring-up.
- Experience with basic control systems, instrumentation, data analysis, and hands-on experimental hardware.
- A Bachelor of Science or Master of Science in Electrical Engineering or Physics, or equivalent self-taught depth.
- Design, build, test, and debug electrical hardware for organ rewarming systems.
- Develop power converters, resonant matching networks, instrumentation, and control systems.
- Use circuit theory, electromagnetics, thermal physics, and measurement data to model system behavior and debug ambiguous hardware problems.
- Build test fixtures, data acquisition systems, experimental setups, and control software for high-power hardware validation.
- Contribute across the full rewarming hardware stack.
About the company
UntilLabs develops reversible cryopreservation technology to extend the viability of human organs for transplantation. The goal is to keep organs alive at cryogenic temperatures long enough to improve organ matching and reduce waste from time limits, potentially weeks or months of preserved time. The approach uses cooling to very low temperatures (below -130°C) with cryoprotectants to prevent ice damage, followed by advanced warming methods to revive the organs without harm. While cryopreservation has worked for cells and simple tissues, UntilLabs works on scaling this to whole organs, tackling challenges like ice formation and nutrient/waste management in large tissues. In the long term, the company envisions whole-body reversible cryopreservation as a bridge to future medical cures.
Company Size
51-200
Company Stage
Series A
Total Funding
$58M
Headquarters
San Francisco, California
Founded
2024
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Simplify's Take
What believers are saying
- 2026 hiring spans perfusion, cardiac biology, and organ perfusion, signaling active R&D expansion.
- Pig organ isolation and ex-vivo evaluation roles suggest near-term preclinical organ validation.
- The 2026 patent strengthens defensibility around cryoprotectants, vitrification, and rewarming hardware.
What critics are saying
- X-Therma already has FDA Breakthrough status and 120-hour kidney preservation claims.
- Until still has no public human transplant data, leaving commercialization unproven.
- Whole-body cryopreservation messaging invites regulatory scrutiny and distracts from organ preservation execution.
What makes UntilLabs unique
- Founders Fund, Lux, and Field backed Until Labs' 2025 $58M Series A.
- Until's 2026 site says it has raised $100M+ and is hiring.
- Its patent for reversible cryopreservation covers perfusion, pressure, and volumetric rewarming.
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Benefits
- Health Insurance
- Dental Insurance
- Vision Insurance
- Flexible Work Hours
- Paid Holidays
- 401(k) Retirement Plan
- Health Savings Account/Flexible Spending Account
- Commuter Benefits
- Professional Development Budget