Ready to redefine what's possible in molecular diagnostics?

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 highly motivated Data Science + AI Intern to support BillionToOne’s efforts in scaling and automating critical data processes using AI. This internship is ideal for someone with a background in Data Science/Data Engineering/AI and an interest in applying AI-driven solutions to optimize sales operations, laboratory operations, customer support, and billing systems.Be part of a high-performing team on the cutting edge of prenatal and oncology diagnostics, working in a dynamic startup culture within a public company that is committed to changing the lives of hundreds of thousands of patients.

Responsibilities:

Work with stakeholder teams to develop and implement AI-driven automation solutions for scaling sales operations, lab operations, customer support, and billing processes.
Assist in building and maintaining scalable data pipelines to support analytics and machine learning initiatives.
Optimize data workflows by integrating AI models to improve efficiency and decision-making.
Collaborate with cross-functional teams, including engineering, operations, and business teams, to understand requirements and propose data-driven solutions.
Ensure data integrity, security, and compliance with industry best practices.
Document technical processes and provide insights based on analysis and implementation.

Qualifications:

Currently pursuing a degree in Data Science, Computer Science, or a related field. College graduates are not eligible.
Experience with Cursor, Claude Code, or other AI enabled IDEs is plus.
Strong understanding of data engineering concepts, including ETL pipelines, database management, and cloud computing (e.g. Stitch, dbt).
Experience with SQL, Python, and big data technologies
Experience validating non-deterministic AI automation solutions
Familiarity with machine learning and AI frameworks (e.g., TensorFlow, PyTorch, Scikit-learn) is a plus.
Experience with data visualization (Tableau) is a plus.
Experience working with AWS cloud platform and data pipeline tools is a plus.
Strong problem-solving skills, analytical mindset, and ability to work in a fast-paced environment.

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.

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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