or apply directly on BillionToOne's site. We never take the application ourselves.
Is this posting real?
- This role has been open
- 80 days BillionToOne's roles stay open a median of 81 days
- Reposted
- No
- Salary listed
- No 62% of BillionToOne's roles list one
- Ghost-job risk at BillionToOne
- high 85 stale, 1 reposted of 89 open
- Hiring momentum
- 122 roles opened in the last 90 days ↑ up vs. the prior 90 days
- Last confirmed on the employer's board
- 2026-10-23
Measured from postings appearing on and disappearing from BillionToOne's own greenhouse board since 2026-08-03. Full hiring picture for BillionToOne.
About this role
As a Senior Software Engineer at BillionToOne, you will collaborate with interdisciplinary teams to develop and enhance applications that improve access to genomic medicine. Your role will involve building robust applications using technologies like React, Typescript, and Django, while also mentoring colleagues and ensuring high-quality code. You will work on projects aimed at digitizing workflows and enhancing patient experiences in healthcare settings.
- benefits
- 5/5
- freshness
- 1/5
- career value
- 5/5
- role clarity
- 5/5
- pay transparency
- 5/5
Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of BillionToOne as an employer.
What you need
- 5+ years of professional software development experience
- Deep experience with modern frontend technologies, specifically with Typescript, React, and CSS-in-JS libraries
- Experience with web frameworks such as Django
- Have implemented frontend architecture best practices such as component systems, npm workspaces, Storybook, and Playwright testing
- Familiarity with modern AI-driven development practices and tools
- Excited about working in-person with our team in Menlo Park
Nice to have
- Previous startup or entrepreneurial experience
- Experience in driving products from zero to one
- Familiarity with healthcare data and standards like FHIR and HL7
- Interest in engaging with and applying LLMs
What you get
- Working alongside brilliant, kind, passionate and dedicated colleagues
- 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 eligible employees (16 weeks, paid at 100%)
- Supplemental fertility benefits coverage
Worth weighing
- Hybrid work model (onsite 2-3 days/week)
- Role involves working in a fast-paced entrepreneurial environment
- No specific mention of work-life balance or flexible hours
Summarised from BillionToOne's posting. Read the full original.
Listed by BillionToOne on their greenhouse job board, last confirmed open on 2026-10-23. PitchMeAI is not the employer.
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