Senior Finance Systems Analyst

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.

BillionToOne is seeking a Senior Finance Systems Analyst who will play a pivotal role in driving technology solutions across our finance function. This is a hands-on manager-level role, responsible for the administration, optimization, and integration of financial systems to support scaling operations and compliance with public company standards.

You’ll act as the key liaison between Accounting, Billing, and IT to ensure that systems and projects are aligned with business goals and internal control requirements. Your expertise in ERP systems, audit compliance, and cross-functional collaboration will be essential in enhancing the efficiency, accuracy, and control of our financial processes.

• →Financial Systems Support & Administration
  • →Assist with the administration and day-to-day support of financial technologies, including ERP systems and related finance tools.
  • →Manage NetSuite configurations such as workflows, saved searches, roles, and user access under guidance from senior team members.
  • →Support implementation and enhancement of system features and integrations across Finance and Supply Chain.
  • →Identify opportunities to streamline processes and improve automation within finance systems.
  • →Assist with data integrity, system maintenance, and troubleshooting for finance-related applications.
  • →Support data integrations and work with IT on resolving integration-related issues.
• →Cross-Functional Partnership
  • →Work with Accounting, HR, Billing, and IT to translate business needs into system requirements and functional updates.
  • →Assist Accounting during the monthly/quarterly close cycle by ensuring data accuracy and addressing system-related issues.
  • →Support reporting, analysis, and planning tool integrations as needed.
  • →Contribute to documentation of system requirements, test cases, and change requests.
  • →Help coordinate system updates, testing, and deployment activities for finance system initiatives.
• →Compliance & Controls
  • →Maintain systems and processes in alignment with internal control frameworks and SOX readiness efforts.
  • →Support audit activities by preparing system documentation, ensuring accuracy of financial system data, and providing required system access evidence.
  • →Assist in maintaining IT SOX documentation related to finance systems.

• 4–5+ years of experience supporting financial systems, preferably with hands-on NetSuite administration.
• Experience supporting financial audits and understanding of internal controls (SOX exposure preferred).
• Bachelor’s degree in Accounting, Information Systems, Computer Science, or a related field.
• Strong understanding of financial processes and reporting requirements.
• Demonstrated ability to support finance system enhancements and assist with system projects.
• Excellent analytical and problem-solving skills with strong attention to detail.
• Ability to manage multiple priorities and work in a fast-paced, dynamic environment.
• Strong communication skills and ability to work cross-functionally with both technical and non-technical teams.
• Experience with AI tools and automation.

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.

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.

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.

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