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.

With over 700 employees, half a million patients helped, and one of the most successful IPOs in medical diagnostics history behind us, we're just getting started. 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 passionate Clinical Laboratory Associates (CLA) to be responsible for assisting our day-to-day operations, providing equipment maintenance in the clinical laboratory, completing the pre-analytical phase of testing (e.g., specimen receipt, accessioning, and plasma/buffy coat isolation), performing quality assurance procedures, while complying with all local, state, and federal laboratory requirements. The Clinical Laboratory Associate (CLA) is an onsite position (Union City or Menlo Park) and provides a great opportunity for career growth - at BillionToOne, we offer an array of career growth opportunities and a clear growth tracks supported by our performance reviews (every 6 months).

Austin Expansion Update:

We are building a brand-new state-of-the-art laboratory in Austin, Texas, expected to launch in late 2027 / early 2028, and we are looking for talented laboratory professionals who want to be part of this journey from the very beginning.

Candidates hired into this role will initially relocate to the Bay Area (Union City, CA) to train and work alongside our experienced laboratory teams. During this time (up to ~18 months), you will gain deep hands-on experience with BillionToOne's cutting-edge molecular diagnostic workflows, quality systems, and laboratory operations before transitioning to our new Austin facility once it opens.

This is a unique opportunity to gain hands-on training with our experienced lab teams and become one of the founding members of our Austin laboratory.

Responsibilities:

• Perform specimen receipt and accessioning according to the laboratory's standard operating procedures
• Perform isolation procedures according to the laboratory's standard operating procedures to CLA responsibilities
• Maintain equipment according to the laboratory's standard operating procedures
• Clean labware, equipment, and benches
• Prepare documents and binders for equipment and personnel records
• Document all corrective actions taken when test systems deviate from the established performance specifications
• Perform and document routine preventative maintenance
• Prepare reagents required for laboratory preparation
• Communicate effectively with coworkers and non-laboratory personnel
• Report all concerns of accessioning quality and/or safety to the Laboratory Director, Supervisor, or Safety Officer
• Participate in inspection preparation activities
• Review of controlled documents as assigned
• Participate in the training of new accessioning personnel on current procedures including the following:
• Provide hands-on training
• Provide guidance, feedback, and mentorship while respecting various learning styles
• Ensure appropriate documentation is reviewed and completed
• Participate in training meetings
• Prioritize a positive work environment
• Exhibit a dedication to teamwork above and beyond scheduled daily work
• Participate in projects and process improvements for sample receipt and accessioning

Qualifications

• Bachelor's degree or equivalent in biology or related life sciences field
• Excellent attention to detail
• Effective written and verbal communication skills
• The ability to multitask and work independently

Nice-To-Haves:

• Biophysics, Molecular biology (DNA purification, PCR, electrophoresis) or next-generation DNA sequencing laboratory experience
• At least 6 months of experience with molecular biology techniques in a research or clinical laboratory
• Previous clinical laboratory experience is preferred

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 thousands 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 and greatest hardware (laptop, lab equipment, facilities)
• Daily on-site lunches provided from top eateries
• 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, (2) the opportunity for professional growth, (3) corporate bonus program, on top of (4) industry leading company benefits (free healthcare options, 401k match, very generous fully paid parental leave, etc.).

For this position, we offer a total compensation package of $64,178 per year, including a base pay rate of $28.47 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.

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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 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