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Senior Research Associate, Cell Culture

Job in San Francisco, San Francisco County, California, 94199, USA
Listing for: Septerna
Full Time, Contract position
Listed on 2026-01-27
Job specializations:
  • Research/Development
    Research Scientist, Clinical Research
  • Healthcare
    Clinical Research
Salary/Wage Range or Industry Benchmark: 36 - 45 USD Hourly USD 36.00 45.00 HOUR
Job Description & How to Apply Below
Position: Senior Research Associate, Cell Culture (Contract role)

Overview

Septerna is a biotechnology company based in South San Francisco, CA on a mission to develop life-changing medicines. The portfolio focuses on GPCRs using the Native Complex Platform to recapitulate GPCRs with their native structure, function, and dynamics outside of the cellular context. Septerna is building an emerging pipeline of GPCR-targeted small molecule programs with potential for growth to address many GPCRs that have been undruggable and unexploited to date.

We are excited to expand our multidisciplinary team to create revolutionary medicines that address unmet patient needs. We embrace diversity of thought, expertise, and background through collaboration. To join our ambitious team, bring your real self to work, grow and learn from a talented team of drug hunters, scientists, and business professionals, and contribute your passion, creativity, and energy to our mission.

We share a fearless pursuit of ground-breaking innovations and cultivate an environment where employees succeed by learning from each other and working as a team.

We are committed to developing meaningful therapeutics for patients with indications of high unmet need. This is a tremendous opportunity to work with talented individuals on the front lines of therapeutic discovery and development. You will help move therapies through preclinical research, positioning them for success in the clinic. The successful candidate will contribute their passion, unique talents, and expertise to a dynamic team motivated to discover new disease-modifying therapeutics for patients in a fast-paced environment.

For more information see:

The Role

We are seeking passionate and creative individuals who want to contribute to Septerna’s mission to utilize innovative drug discovery technologies for GPCR targets. The ideal candidate will have experience in eukaryotic cell culture of suspension-based cell lines including HEK
293, including cell line maintenance, transfection, and protein expression. The chosen candidate will work in a collaborative team contributing to improvements in protein expression and purification to support production and characterization of proteins for use in structural biology, biophysics, and small molecule drug discovery. This position offers the opportunity to join an innovative, well-funded biotechnology company and contribute to its long-term success.

The position is based in South San Francisco, CA. Title and compensation are commensurate with experience. 40hrs/week, one year contract.

Responsibilities
  • Perform as a hands-on cell culturist to help fully enable Septerna’s Native Complex
  • Carry out continuous cell line maintenance primarily on Expi
    293 suspension cell lines, and insect cells when required
  • Perform transient transfections, stable pool selection, and cell line cryopreservation of Expi
    293 cell lines
  • Carry out small- and large-scale cell culture for production of recombinant proteins
  • Assist with protein purification and protein-related assay technologies including ELISAs, SDS-PAGE, and DSF
  • Collaborate with Discovery Biology teams to prioritize and timeline cell culture requests
  • Maintain laboratory notebooks, data analysis, and documentation
Qualifications
  • BS/MS with 2+ years of hands-on relevant experience in a biotechnology or pharmaceutical setting
  • 1+ years demonstrated expertise in high-quality mammalian cell culture of suspension cell lines including HEK
    293, preferably using the Expi
    293 system
  • Experience in transient transfection, cell line maintenance, cell counting, stable pool selection, and cell cryopreservation
  • Prior experience with ELISA assays and basic protein techniques (SDS-PAGE, Nanodrop, DSF) is desirable
  • Ability to organize multiple projects to ensure delivery of reagents with appropriate prioritization and timelines
  • Demonstrated experience working collaboratively in a team-oriented environment
  • Clear and effective verbal and written communication skills

The anticipated salary range for candidates who will work in South San Francisco, CA is $36/hr - $45/hr pay rate. Individual pay may vary based on additional factors, including job-related skills, experience, work location, and relevant education or training.

Additional Notes

Note to Employment Agencies:
Please do not forward agency resumes. The company will not be responsible for any fees related to unsolicited resumes.

We are an Equal Opportunity employer and will consider all qualified applicants for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, or disability status. Septerna participates in the E-Verify program. California Consumer Privacy Act Privacy Notice For Job Applicants: if you are a California resident,  for our CCPA Notice.

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Position Requirements
10+ Years work experience
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