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 something extraordinary—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 don't just aim for incremental improvements; we strive to build products that are 10x better than anything that exists today. Our people are our greatest asset: talented scientists, engineers, sales professionals, and visionaries 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—every innovation you contribute helps remove fear of 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 a Process Engineering Intern whose academic interests span bioengineering and data science. This role will involve a deep dive into the data infrastructure, metrics, and systems used to support high quality production of cfDNA-based NIPT assays.  This internship will be an immersive exploration of data systems in a fast paced, rapidly growing biotech and will provide an opportunity to see first hand how scaling organizations utilize data to inform critical business decisions. The role will require an understanding of molecular techniques and modern sequencing technology. This internship will also provide an excellent opportunity to explore the emerging potential of AI tools and their applications within the biotech sector. The Process Engineering Intern is a hybrid (onsite 2-3 days/week) position and reports to the Process Engineer.

Responsibilities:

• Assist in designing, executing, and optimizing wet lab experiments aimed at improving process efficiency and reliability in prenatal diagnostic testing.
• Perform hands-on laboratory procedures, including reagent preparation, pipetting, PCR, nucleic acid extraction, and other molecular biology techniques.
• Explore and evaluate new technologies and molecular biology methodologies to enhance assay performance and efficiency.
• Contribute to the generation and analysis of data to assess quality, consistency, and reproducibility of experimental processes.
• Collaborate closely with process engineering team members to interpret results and troubleshoot experimental challenges effectively.
• Adhere rigorously to lab safety standards, maintaining cleanliness and organization within the wet lab area.
• Participate in regular team meetings to discuss project progress, challenges, and solutions.

Qualifications:

• Currently pursuing a Bachelor's or Master's degree in Bioengineering, Chemical Engineering, Biomedical Engineering, Biology, Molecular Biology, Biochemistry, Genetics, or a related scientific discipline.
• Hands-on laboratory experience with molecular biology techniques such as PCR, qPCR, DNA/RNA extraction, and reagent preparation preferred.
• Demonstrated ability to accurately record experimental data and maintain organized lab records according to good laboratory practices.
• Strong analytical and problem-solving skills, including basic data analysis experience using tools such as Excel, Python, or R.
• Excellent attention to detail, reliability, and ability to maintain high-quality laboratory practices.
• Strong written and verbal communication skills, able to communicate experimental results and insights effectively.
• Flexibility and willingness to learn and adapt to new techniques, technologies, and research areas quickly.
• Familiarity with standard laboratory safety protocols and commitment to maintaining a safe and organized workspace.
• Ability to work independently and as part of a team in a fast-paced environment.
• Enthusiasm for learning new technologies and applying them in real-world scenarios

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 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: $4,333 per month.

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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 revolutionary QCT molecular counting technology enhances disease detection resolution by over a thousandfold using cell-free DNA—a breakthrough that's already transformed the lives of over half a million patients worldwide.

Our Impact: We've pioneered game-changing diagnostic solutions that are redefining industry standards. Unity Complete™ stands as the only non-invasive prenatal screen capable of assessing fetal risk for both common recessive conditions and aneuploidies from a single maternal blood sample. In oncology, 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 $125 million in Annual Recurring Revenue in just four years. We've raised close to $400 million in funding, including a $130 million Series D round in June 2024, achieving a valuation of over $1 billion. This backing comes from world-class investors including Hummingbird, Adams Street Partners, Neuberger Berman, Baillie Gifford, and Premji Invest.

Our Recognition: Forbes recently named us one of America's Best Startup Employers for 2025, and we were awarded Great Place to Work certification in 2024—with an incredible 100% of our people reporting they are willing to give extra to get the job done. These honors recognize not just our innovation but the exceptional culture we've cultivated—one that remains authentically collaborative and transparent even as we've scaled.

Our Future: Headquartered in Menlo Park with facilities in Union City, California, we're continuing to push the boundaries of what's possible in molecular diagnostics. Recent clinical outcomes data for Unity Fetal Risk Screen and new advances in cancer diagnostics prove we're just getting started.

At BillionToOne, you'll join a diverse team of passionate innovators who believe that 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?

Learn more at www.billiontoone.com