Medical Research Support Associate

A Rare Opportunity to Shape the Future of Genomics Join a team of brilliant, passionate innovators determined to transform healthcare. 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. The Research Associate position at BillionToOne is exceptionally rare at the undergraduate or early-career level. Your work will help shape the development of high-impact molecular diagnostic products that are actively changing patient outcomes in both oncology and prenatal medicine. This is your chance to contribute to building novel molecular tests that help patients from day one. You will work alongside and be mentored by scientists with interdisciplinary expertise across molecular biology, genomics, bioinformatics, and quantitative modeling. You will have the chance to use cutting-edge molecular techniques, next-generation sequencing, and robotic tools to move assays from research prototypes to commercially available products run at large scale on real patient samples in our clinical lab. Whether your ambition is to grow here at BillionToOne or ultimately pursue graduate studies, this position would be a solid foundation for your scientific career. The Research Associate is an on-site position in our Menlo Park, CA office. You think rigorously about data. You understand that the quality of an experiment determines what we can learn from it. You want to understand why things work, push the boundaries of what's known, and do what it takes to see your contributions show up in products that help real patients. You share findings clearly and proactively, ask questions early rather than late, and work seamlessly across scientists, engineers, and cross-functional teams to keep projects moving. Present scientific findings both verbally at group meetings and via internal written reports Document experimental details and results Collaborate with other teams to implement lab and bioinformatic workflows Contribute positively to organizing and maintaining the R&D lab BS or MS in Bioengineering, Molecular and Cell Biology, Microbiology, Biophysics, Biochemistry, or related field

• 1–2 years of research experience (either during BS/MS or afterwards)
• Previous experience with standard molecular biology techniques (in particular, extensive experience with PCR, electrophoresis, DNA purifications)
• you find the GRE math section to be extremely easy)
• Knowledge of medical genetics

Experience with computational analysis in R, Python, or other programming language Working alongside brilliant, kind, passionate and dedicated colleagues, in an empowering environment, toward a global vision, striving for a future in which transformative molecular diagnostics can help millions of patients Multiple medical benefit options; Retirement savings program including a 4% Company match Latest and greatest hardware (laptop, lab equipment, facilities) Daily on-site lunches provided from top eateries Free on-site EV charging (compatible with all EVs, including Tesla) At BillionToOne, we are proud to offer a combination of a (1) base pay range (actual amount offered is based on experience and salary/equity options split that the candidate chooses), (2) generous equity options offering, (3) corporate bonus program, on top of (4) industry leading company benefits (free healthcare options, 401k match, very generous fully paid parental leave, etc.). This position is eligible for an annual bonus and receives a new hire equity grant of up to $20,000 at grant value, vesting over four years, plus annual equity refresh grants equal in value to the new hire grant. Together, the total four-year value of base, target bonus, and equity is up to approximately $433,000. We also offer competitive medical and dental coverage and a 401(k) with company match. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. BillionToOne is a next-generation molecular diagnostics company on a mission to make powerful, accurate diagnostic tests accessible to everyone. Our revolutionary QCT molecular counting technology enhances disease detection resolution by over a thousandfold using cell-free DNA,a breakthrough that has already transformed the lives of over half a million patients worldwide. 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. Unity Confirm™ enables non-invasive confirmation for high-risk screening results through the capture of intact circulating fetal cells using BillionToOne's Fetal Cell Capture™ Technology. 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. 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.