Reagent Manufacturing Associate (RMA) II, Oncology

A Rare Opportunity to Shape the Future of Genomics 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 Reagent Manufacturing Associate II, Oncology to join our growing reagent manufacturing team in support of clinical patient testing in our high throughput CLIA lab. The Reagent Manufacturing Associate II will be responsible for assisting with the manufacturing, assembly, and qualification of reagents in support of clinical laboratory operations at BillionToOne. The selected candidate will also be responsible for assisting in the troubleshooting of reagent manufacturing activities, management of sufficient reagent inventory, and operation of high-throughput automated equipment to support operations. . This position requires an individual with excellent attention to detail, effective written and verbal communication skills, the ability to multitask, and the ability to work both independently and as part of a highly collaborative team environment. The role is a f ull-time onsite position in Menlo Park, CA and reports to Senior Process Engineer II, Oncology. Shift Hours: Monday - Friday, 9am - 5pm Responsibilities: Manufacture medium and high complexity reagents in a molecular manufacturing lab according to established SOPs. Operation of robotic laboratory equipment and traditional lab equipment (micropipettes, liquid handlers, thermal cyclers, centrifuges, sealers, sonicator, etc.) Use of traditional molecular biology processes and techniques (small volume pipetting, plating, quantitation, visual inspection) Maintaining thorough, accurate and detailed documentation of all work produced, including deviations Inventory management Collaborate with Research and Development for the scale-up and implementation of new reagent formulations. Participate in reagent troubleshooting and quality monitoring Lab maintenance such as labware cleaning and equipment maintenance as needed Daily completion of assigned tasks to keep manufacturing on track Reagent manufacturing will primarily be operating out of Menlo Park but may require some flexibility to work out of the Union City location Requirements: Bachelor’s degree or equivalent degree in biology, chemistry, or clinical related sciences At least one year of experience with molecular biology techniques in a research or clinical laboratory Excellent attention to detail Effective written and verbal communication skills The ability to multitask and work independently Patience and flexibility Previous clinical laboratory experience is preferred Nice-to-Haves: Start-up experience Experience in a cell-free DNA setting Experience developing training programs and performing knowledge transfer. Strong communication skills (verbal and written). Ability to effectively work in a team environment and build strong working relationships. High degree of initiative and self-motivation. Benefits And Perks: 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 Open, transparent culture that includes weekly Town Hall meetings The ability to indirectly or directly change the lives of hundreds of thousands patients Multiple medical benefit options; employee premiums paid 100% of select plans, dependents covered up to 80% Extremely generous Family Bonding Leave for new parents (16 weeks, paid at 100%) Free UNITY Complete NIPT testing for employees & spouses Supplemental fertility benefits coverage Retirement savings program including a 4% Company match Increase paid time off with increased tenure Latest and greatest hardware (laptop, lab equipment, facilities) Free daily on-site lunches provided from top eateries A variety of perks on campus (state of the art gym, restaurant) 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.). For this position, we offer a total compensation package of $105,218 per year, including a base pay range of $80,388 - $91,107 per year. 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. For more information about how we protect your information, we encourage you to review our Privacy Policy . 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. Our Impact 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. Our Growth 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. Our Recognition 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. Our Future 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

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