Process Engineering Associate I/II, Oncology

Confirmed live in the last 24 hours

BillionToOne

Compensation

$75,029 - $85,748/year

Menlo Park, CA

On-site

Posted April 13, 2026

Job Description

Ready to redefine what's possible in molecular diagnostics?

Join a team of brilliant, passionate innovators determined to transform healthcare. At BillionToOne, we've built a category-defining, publicly traded company on Nasdaq where transparency fuels trust, collaboration drives breakthroughs, and every contribution moves the needle on our mission to make life-changing diagnostics accessible to all. We don't just aim for incremental improvements; we build products that are 10x better than anything that exists today.

Our scientists, engineers, sales executives, and visionaries are united by an unwavering commitment to changing the standard of care in prenatal and cancer diagnostics. This is where cutting-edge science meets human compassion, and every innovation you contribute helps remove the fear of the unknown from some of life's most critical medical moments.

If you're driven by purpose, energized by innovation, and ready to help shape the future of precision medicine at scale, this is where you belong.

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 (1) developing new tools for improved clinical workflow efficiency, (2) analyzing process data to monitor and troubleshoot our high-throughput assays, 3) identifying root causes of recurring errors with proper documentation to enable long term corrective actions. This role will enable an individual to gain both deep and broad experience in the areas of process engineering, data analysis, experimental design, and automation. This position will also allow time to apply knowledge of coding languages like python and R to real world problems encountered within high paces and dynamic clinical laboratories. This is considered an onsite role and will require the majority of days to be spent in the Menlo Park office.

Responsibilities:

Apply sound engineering practices to scale, optimize, and improve molecular biology methods.
Conduct experiments to identify, isolate, and confirm root causes of process errors in our high-throughput molecular biology lab.
Develop methods to compile and analyze large amounts of process data to assess for process stability, trending, and areas for improvement.
Develop and implement software tools to aid in efficient sample processing within the clinical laboratory.
Develop, implement, and use software tools to quantitatively analyze process efficiency and sources of error, to require moderate proficiency in R or Python.
Identify root causes for process and instrument errors and develop short term and long term solutions.
Develop effective training plans for clinical personnel on modified/improved workflows.
Support transfer of new technology from Research and Development teams to the CLIA lab.
Generate proper documentation for all troubleshooting and qualification.

Requirements:

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

Nice-To-Haves: