Bioinformatics Intern, Prenatal

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 Bioinformatics Intern, Prenatal to join and support our Bioinformatics team in developing bioinformatics pipelines and analyzing next-generation DNA sequencing data. This position will focus on an analysis and/or development project with guidance from Bioinformatics team members. BTO is a dynamic, start-up environment that requires adaptability and the ability to quickly learn and apply new concepts. This internship will provide valuable mentorship from BI Associates and BI Senior Scientists, hands-on experience, and professional development opportunities. The Bioinformatics Intern is a full-time onsite position in our Menlo Park office for 10 weeks.

• →Conduct a research and/or development project centered on one of our prenatal assays
• →Improve next-generation sequencing analysis pipelines under the guidance of  Bioinformatics team members
• →Communicate through presentations, written reports, and/or code review
• →Collaborate with scientists and support new scientific insights

• Currently enrolled in a Bachelor's or Master's program in Bioinformatics, Biology, Computational Biology, Computer Science, Bioengineering, Physics, or other related fields
• Strong programming skills in Python and R 
• High mathematical and statistical aptitude
• Great attention to detail
• Curious about pursuing a career in Bioinformatics

• Familiarity with MS Excel, bash, AWS, SQL, and git
• Research experience in bioinformatics, biology, or physical sciences
• Molecular biology (DNA purification, PCR, electrophoresis) or next-generation DNA sequencing laboratory experience

Unity Complete™ is the only non-invasive prenatal screen capable of assessing fetal risk for both common recessive conditions and aneuploidies from a single maternal blood sample. Our Northstar® liquid biopsy test uniquely combines treatment selection with real-time monitoring, giving oncologists unprecedented precision in cancer care.

From $0 to $150M+ in Annual Recurring Revenue in just five years. In 2025, we completed one of the most successful IPOs for a medical diagnostics company, building on nearly $400M in private funding,including our $130M Series D in 2024 and backed by world-class investors including Hummingbird, Adams Street Partners, Neuberger Berman, Baillie Gifford, and Premji Invest.

Forbes named us one of America's Best Startup Employers for 2025 and we're Great Place to Work certified, with 100% of our people willing to go the extra mile, even as we've scaled to over 700 employees.

Headquartered in Menlo Park with facilities in Union City, CA, and a new lab opening in Austin, TX in 2027, we're continuing to push the boundaries of what's possible in molecular diagnostics. We're just getting started.

Ready to help us change the world, one molecule at a time? Learn more at billiontoone.com