Research Associate

BillionToOne; Menlo Park (CA); On-site; USD 73,920 - 84,480; Full time

Benefits offered by this job

Multiple medical benefit options

Generous Family Bonding Leave

Free daily on-site lunches

Job summary

A cutting-edge molecular diagnostics company is seeking a Research Associate in Menlo Park, CA. The role involves performing experiments and assisting Senior Scientists in assay development. Candidates should have a BS or MS in a relevant field with 1-2 years of research experience. This position offers competitive compensation up to $102,929 annually including benefits and perks.

Qualifications

• 1-2 years of research experience (during or after degree).
• Ability to learn analytical and computational methodologies.
• Experience with next-generation sequencing library preparation.

Responsibilities

• Perform experiments and assays under the guidance of Senior Scientists.
• Prepare biological samples and reagents to accelerate the R&D process.
• Keep accurate records of experimental details.

Skills

Standard molecular biology techniques

Mathematical aptitude

Attention to detail

Education

BS or MS in Molecular and Cell Biology or related field

Tools

PCR

Electrophoresis

DNA purification

Job description

Ready to redefine what's possible in molecular diagnostics?

Join a team of brilliant, passionate innovators who wake up every day determined to transform healthcare. At BillionToOne, we’ve built a culture where transparency fuels trust, collaboration drives breakthroughs, and every voice matters in our mission to make life-changing diagnostics accessible to all. We strive to build products that are 10x better than what exists today. Our people are our greatest asset: talented scientists, engineers, sales professionals, and visionaries united by a commitment to changing the standard of care in prenatal and cancer diagnostics. This is where cutting-edge science meets human compassion—every innovation you contribute helps remove 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 build the future of precision medicine, this is where you belong.

We are looking for an interdisciplinary Research Associate to perform experiments and assays under the guidance of Senior Scientists. The Research Associate is an on-site position in our Menlo Park, CA office.

Responsibilities:

• Perform experiments and assays under the guidance of Senior Scientists
• Learn analytical and computational methodologies and analyze the results under the guidance of Senior Scientists
• Assist Senior Scientists in assay development
• Keep accurate and meticulous records of experimental details and results
• Prepare biological samples and reagents to accelerate the R&D process
• Manage, organize, and support lab operations

Requirements:

• BS or MS in 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)
• An ability to quickly learn mathematical, analytical, and experimental concepts
• High mathematical and statistical aptitude
• Great attention to detail

Nice-To-Haves:

• Knowledge of medical genetics
• Experience in a cell-free DNA setting
• Experience with next-generation sequencing library preparation
• Experience with computational analysis in R, Python, or other programming language
• Working alongside brilliant, kind, passionate and dedicated colleagues, in an empowering environment
• Open, transparent culture that includes weekly Town Hall meetings
• The ability to indirectly or directly change the lives of hundreds of thousands of 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%)
• Supplemental fertility benefits coverage
• Retirement savings program including a 4% Company match
• Increase paid time off with increased tenure
• Latest hardware (laptop, lab equipment, facilities)
• Free daily on-site lunches provided from top eateries
• A variety of campus perks (state of the art gym, restaurant)
• Free on-site EV charging (compatible with all EVs, including Tesla)

At BillionToOne, we offer a total compensation package including base pay, equity options, a corporate bonus program, and industry-leading benefits (healthcare options, 401k match, generous fully paid parental leave, etc.).

For this position, we offer a total compensation package of up to $102,929 per year, including a base pay range of $73,920 - $84,480 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.

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About BillionToOne

BillionToOne is a next-generation molecular diagnostics company on a mission to make powerful, accurate diagnostic tests accessible to everyone. Our QCT molecular counting technology enhances disease detection resolution by over a thousandfold using cell-free DNA, a breakthrough that’s transformed lives globally.

Our Impact: We’ve pioneered diagnostic solutions redefining industry standards. Unity Complete™ is a non-invasive prenatal screen that assesses fetal risk for common recessive conditions and aneuploidies from a single maternal blood sample. In oncology, our Northstar® liquid biopsy test combines treatment selection with real-time monitoring for precision in cancer care.

Our Growth: From $0 to $125 million in ARR in four years. We’ve raised close to $400 million, including a $130 million Series D in June 2024, with a valuation over $1 billion. This backing comes from 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 earned Great Place to Work certification in 2024. We celebrate a culture that is collaborative and transparent as we scale.

Our Future: Headquartered in Menlo Park with facilities in Union City, California, we continue to push the boundaries of molecular diagnostics. Recent clinical outcomes data for Unity Fetal Risk Screen and advances in cancer diagnostics show we’re just getting started.

At BillionToOne, you’ll join a diverse team of passionate innovators who believe the best science happens when brilliant minds collaborate openly, think boldly, and never lose sight of the patients whose lives depend on our work.

Ready to help us change the world, one diagnosis at a time?

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