Do you want to join one of the fastest-growing molecular diagnostics startups and develop products that can affect the lives of millions?

BillionToOne (Y Combinator S17), ranked at the top 5% of Y Combinator companies with $100M+ in funding from prominent VC firms, has developed a DNA molecular counter that increases the cell-free DNA diagnostics resolution by over 1,000 fold. BillionToOne's first product, UNITY™ is the first and only prenatal screen that directly assesses the baby's risk for common and severe inherited disorders such as cystic fibrosis, spinal muscular atrophy (SMA), and hemoglobinopathies from a single tube of blood from the pregnant mother.

We are looking for a Process Engineering Associate to join our growing superstar Process Engineering team in support of clinical patient testing in our high throughput CLIA lab. The PEA I is responsible for working independently to troubleshoot instrumentation and identifying root causes of recurring errors with proper documentation to re-qualify instrumentation back for clinical use. This role is also responsible for qualifying new instrumentation for clinical testing use with proper documentation, and improving clinical processes. This is an onsite role.


  • Support high throughput CLIA lab through troubleshooting instrumentation and re-qualifying instrumentation back into clinical use
  • Perform qualifications for new instrumentation (IQ, OQ, PQ)
  • Identify root cause for instrument errors and work with the service team and  manufacturers for resolutions
  • Improve clinical processes and train clinical personnel on improved workflows
  • Generate proper documentation for all troubleshooting and qualification


  • Bachelor’s degree or equivalent degree in biology or clinical related sciences
  • At least 6 months of experience with molecular biology techniques in a research or clinical laboratory
  • Excellent attention to detail
  • Effective written and verbal communication skills
  • Possess logical troubleshooting skills
  • Previous automation or clinical laboratory experience is preferred


  • Start-up experience
  • Knowledge of medical genetics
  • Experience in a cell-free DNA setting

Benefits and Perks

  • Competitive pay
  • Generous equity package
  • Suite of benefit plans; employee premiums paid 90% of Gold PPO plan
  • Extremely generous Medical, Pregnancy, Parental and Family Leaves
  • Retirement savings program with 4% Company matching
  • Free daily on-site lunches provided from top eateries
  • Latest and greatest hardware (laptop, lab equipment, facilities)
  • A variety of perks on campus (state of the art gym, restaurant)
  • Free on-site EV charging (compatible with all EVs, including Tesla)
  • Working with a team of ‘rockstars’ who bring out the best in everyone
  • The ability to indirectly or directly change the lives of hundreds of thousand patients
  • Open, transparent culture that includes weekly Town Hall meetings

BillionToOne is an equal opportunity employer. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

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