Protein Production & QC Lab Technician

Until; San Francisco (CA); On-site; USD 70,000 - 90,000; Full time

Benefits offered by this job

Medical, dental and vision insurance

401(k) retirement plan

Equity

On-site dining

Learning stipend

On-site fitness center

Commuter benefits

Quarterly team social budget

Job summary

Until is a moonshot company building a pause button for biology. We’re assembling an interdisciplinary team to develop perfusion systems, cryoprotectants, and vitrification hardware for reversible organ cryopreservation.

The Lab Technician role supports recombinant protein production within the Molecular Development team. You will express and purify proteins in bacterial and yeast systems, perform quality-control analyses, and maintain accurate sample and batch records, with on-site training for

Qualifications

• Bachelor’s degree in Biology or related field.
• At least two years of hands-on lab experience.
• Experience with molecular biology and protein purification.
• Familiarity with SDS-PAGE and protein concentration assays.
• Strong documentation and protocol-following skills.

Responsibilities

• Express recombinant proteins in E. coli and yeast using established protocols.
• Purify proteins using affinity chromatography, concentration, and buffer exchange.
• Assess protein concentration, yield, and purity using SDS-PAGE and concentration assays.
• Prepare and replenish culture media, buffers, stock solutions, and reagents with accurate weighing and pH adjustment.
• After training, handle and maintain mammalian cells, including thawing, media changes, passaging and counting.

Skills

Molecular biology

Protein purification

SDS-PAGE

Aseptic technique

Documentation

Lab safety

Education

Bachelor’s degree in Biology, Biochemistry, Bioengineering, Molecular Biology, Chemistry, or related field

Tools

Chromatography systems

Protein assays

Cell culture handling

Job description

Until is a moonshot company building a pause button for biology. We’re assembling an interdisciplinary team to develop perfusion systems, cryoprotectants, and vitrification hardware for reversible organ cryopreservation.

The Lab Technician role supports recombinant protein production within the Molecular Development team. You will express and purify proteins in bacterial and yeast systems, perform quality-control analyses, and maintain accurate sample and batch records, with on-site training for