The Research AssociateIntern position at BillionToOne is exceptionally rare at the undergraduate or early-career level. At BillionToOne, you will do much more than simply run routine protocols. Your work will 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 intern is an on-site position in our Menlo Park, CA office.

Candidates who expect to graduate before Fall 2027 or who have already graduated are encouraged to apply to our full-time Research Associate position.

Who We’re Looking For:

• Strong statistical and quantitative skills: You think rigorously about data. You understand the difference between signal and noise, appreciate the importance of statistical power, and bring quantitative reasoning to every problem.
• Meticulous attention to experimental detail: You understand that the quality of an experiment determines what we can learn from it. You keep rigorous records, design careful controls, and take pride in work that others can rely on and build upon.
• Ambition to make a difference now: You aren’t here to punch the clock. 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.
• Excellent communication in a fast-paced, collaborative environment: We move quickly and we move together. 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.

Responsibilities:

• Design, execute, and troubleshoot experiments and assays under the guidance of Senior Scientists
• Learn analytical and computational methodologies to analyze results under the guidance of Senior Scientists
• Present scientific findings both verbally at group meetings and via internal written reports
• Document experimental details and results

Qualifications:

• Must be enrolled in an undergraduate or master’s degree program during Fall 2027
• Anticipated BS or MS in Bioengineering, Molecular and Cell Biology, Microbiology, Biophysics, Biochemistry, or related field
• Independent research experience
• An ability to quickly learn mathematical, analytical, and experimental concepts
• High mathematical and statistical aptitude (e.g., you find GRE math section to be extremely easy)
• Great attention to detail

Nice-To-Haves:

• Experience with standard molecular biology techniques relating to DNA such as PCR
• 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

Benefits And Perks:

• Working with a team of ‘rockstars’ who bring out the best in everyone
• Open, transparent culture that includes weekly Town Hall meetings
• The ability to indirectly or directly change the lives of hundreds of thousand patients
• Free daily on-site lunches provided from top eateries
• Latest and greatest hardware (laptop, lab equipment, facilities)
• 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 (1) competitive base pay, and (2) the opportunity for professional growth.

For this position, the base pay rate is $25 per hour.