AI Engineering Intern at BillionToOne

<div class="content-intro"><h2><strong>Ready to redefine what's possible in molecular diagnostics?</strong></h2> <p>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.</p> <p>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.</p> <p>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.</p></div><p>As BillionToOne scales rapidly, we are building a world-class Commercial Data &amp; Applied AI team. We are seeking a motivated <strong>AI Engineering Intern</strong> to support the design and implementation of AI and automation solutions that optimize operations across our commercial, billing, and customer experience teams.</p> <p>This is an internship for those excited about applying LLMs, AI, ML, and automation to real-world business challenges in healthcare. You will have the opportunity to learn from experienced engineers on a new team while making meaningful contributions to high-impact projects. You will work cross-functionally with stakeholders in Sales, Marketing, Revenue Operations, Billing, Customer Experience, and IT to support AI-driven solutions that improve scalability and efficiency.</p> <p>We are builders at heart. We value a strong sense of ownership, intellectual curiosity, and a bias toward action.</p> <p>This is a hybrid role requiring 2–3 days per week on-site in Menlo Park with the team.</p> <p><strong>Responsibilities:</strong></p> <ul> <li>Contribute to the development of LLM-powered applications (retrieval systems, AI agents, workflow automation, vector storage) that integrate with internal systems and data sources</li> <li>Work with business stakeholders and senior engineers to identify automation opportunities and help define requirements</li> <li>Assist in building lightweight data pipelines and analytics to support AI applications and measure their impact</li> <li>Contribute to projects across the development lifecycle&nbsp; from prototyping and iteration through testing and deployment</li> </ul> <p><strong>Qualifications:</strong>&nbsp;&nbsp;</p> <ul> <li>Currently pursuing (or recently completed) a Bachelor's, Master's degree or PhD</li> <li>Familiarity with Python and basic comfort with SQL</li> <li>Exposure to LLM APIs (OpenAI, Anthropic, etc.) through coursework, personal projects, or hackathons</li> <li>Strong communication skills and eagerness to learn how business problems translate into technical solutions</li> <li>Self-directed and comfortable asking questions in a fast-paced, ambiguous environment</li> </ul> <p><strong>Nice-to-Haves:</strong></p> <ul> <li>Personal projects, hackathon experience, or coursework involving LLMs or ML</li> <li>Exposure to retrieval architectures, vector databases, or embedding models</li> <li>Familiarity with cloud platforms (AWS, GCP, or Azure)</li> <li>Experience with ML frameworks (scikit-learn, PyTorch, TensorFlow)</li> <li>Interest in healthcare, biotech, or regulated industries</li> </ul> <p class="p1"><strong>Benefits And Perks:</strong></p> <ul class="ul1"> <li class="li1">Working with a team of ‘rockstars’ who bring out the best in everyone</li> <li class="li1">Open, transparent culture that includes weekly Town Hall meetings</li> <li class="li1">The ability to indirectly or directly change the lives of hundreds of thousand patients</li> <li class="li1">Free daily on-site lunches provided from top eateries</li> <li class="li1">Latest and greatest hardware (laptop, lab equipment, facilities)</li> <li class="li1">A variety of perks on campus (state of the art gym, restaurant)</li> <li class="li1">Free on-site EV charging (compatible with all EVs, including Tesla)</li> </ul> <p>At BillionToOne, we are proud to offer a combination of (1) competitive base pay, and (2) the opportunity for professional growth.</p> <p>For this position, the base pay rate is&nbsp;<span data-sheets-root="1">$25</span> per hour.</p> <div class="styles--2Kv6p" data-ui="careers-page-content"> <div> <div class="job-preview__description job-preview__description--reflow " data-test-description=""> <p><em>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.</em></p> </div> </div> </div><div class="content-conclusion"><p>For more information about how we protect your information, we encourage you to review our <a href="https://billiontoone.com/privacy-policy/">Privacy Policy</a>.</p> <p>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.</p> <h3><strong>Our Impact</strong></h3> <p><a href="https://www.unityscreen.com/"><strong>Unity Complete™</strong></a> 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 <a href="https://www.northstaronc.com/"><strong>Northstar®</strong></a> liquid biopsy test uniquely combines treatment selection with real-time monitoring, giving oncologists unprecedented precision in cancer care.</p> <h3><strong>Our Growth</strong></h3> <p>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.</p> <h3><strong>Our Recognition</strong></h3> <p>Forbes named us one of <strong>America's Best Startup Employers for 2025</strong> and we're <strong>Great Place to Work certified</strong>, with 100% of our people willing to go the extra mile, even as we've scaled to over 700 employees.</p> <h3><strong>Our Future</strong></h3> <p>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.</p> <hr> <p>Ready to help us change the world, one molecule at a time? Learn more at<a href="https://www.billiontoone.com"> billiontoone.com</a></p></div>