BillionToOne
Senior Software Engineer, Digital Experiences
BillionToOne, Menlo Park, California, United States, 94029
Overview
Senior Software Engineer, Digital Experiences at BillionToOne. Join a team focused on transforming healthcare through innovative software that supports precision medicine in prenatal and cancer diagnostics. This role is hybrid (onsite 2-3 days/week) and involves collaborating with clinicians, computational biologists, and engineers to scale personalized genomic medicine to millions of patients. Projects you may work on
Build seamless digital experiences so clinicians and patients across diverse care centers can access BillionToOne’s genetic testing. Digitize laborious and error-prone paper-based workflows in busy OBGYN clinics. Enable better transfer of care through portable electronic medical records. Infuse joyful experiences into pregnancy. Technologies we use include: Python, Django, Postgres, React, Typescript, AWS, Salesforce, and emerging AI-assisted coding environments (e.g., Cursor, GitHub Copilot, Claude Code). Responsibilities
Build and maintain robust applications and systems using React, Typescript, Django, Postgres, and other libraries. Collaborate with product design and product management to deliver delightful experiences for patients and providers. Foster a knowledge-sharing culture within the team, contributing to the growth and development of colleagues through mentorship and collaborative learning. Demonstrate a creative mindset, offering innovative solutions to complex technical challenges. Prioritize quality by writing comprehensive unit tests and ensuring adequate test coverage across all components and modules. Demonstrate ownership and end-to-end project delivery with autonomy to make informed decisions and drive projects forward. Champion engineering excellence through architectural best practices, code quality standards, and thoughtful code reviews emphasizing functionality and security. Apply security and compliance mindset, adhering to regulations while safeguarding sensitive patient information. Confidently challenge ideas when necessary while leveraging expertise to improve solutions. Requirements
5+ years of professional software development experience with a proven track record of delivering complex projects and following best practices. Deep experience with modern frontend technologies, specifically TypeScript, React, and CSS-in-JS libraries. Experience implementing frontend architecture best practices such as component systems, npm workspaces, Storybook, and Playwright testing. Experience with Django or similar web frameworks. Familiarity with modern AI-driven development practices and tools. Excited about working in-person with the team in Menlo Park. Nice-to-haves
Previous startup or entrepreneurial experience. Experience driving products from zero to one. Familiarity with healthcare data standards like FHIR and HL7. Interest in engaging with and applying LLMs. Open, transparent culture and collaborative environment with a global vision. Comprehensive benefits, parental leave, and compensation packages typical of the role. About BillionToOne
BillionToOne is a next-generation molecular diagnostics company on a mission to make powerful, accurate diagnostic tests accessible to everyone. Our QCT molecular counting technology enhances disease detection resolution using cell-free DNA, transforming lives worldwide. Our impact includes Unity Complete, an oncology and prenatal diagnostics portfolio, and rapid growth with significant funding and recognition as an innovative employer. We value collaboration, openness, and patient-centric innovation. Headquartered in Menlo Park with facilities in Union City, California, we are advancing the boundaries of molecular diagnostics.
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Senior Software Engineer, Digital Experiences at BillionToOne. Join a team focused on transforming healthcare through innovative software that supports precision medicine in prenatal and cancer diagnostics. This role is hybrid (onsite 2-3 days/week) and involves collaborating with clinicians, computational biologists, and engineers to scale personalized genomic medicine to millions of patients. Projects you may work on
Build seamless digital experiences so clinicians and patients across diverse care centers can access BillionToOne’s genetic testing. Digitize laborious and error-prone paper-based workflows in busy OBGYN clinics. Enable better transfer of care through portable electronic medical records. Infuse joyful experiences into pregnancy. Technologies we use include: Python, Django, Postgres, React, Typescript, AWS, Salesforce, and emerging AI-assisted coding environments (e.g., Cursor, GitHub Copilot, Claude Code). Responsibilities
Build and maintain robust applications and systems using React, Typescript, Django, Postgres, and other libraries. Collaborate with product design and product management to deliver delightful experiences for patients and providers. Foster a knowledge-sharing culture within the team, contributing to the growth and development of colleagues through mentorship and collaborative learning. Demonstrate a creative mindset, offering innovative solutions to complex technical challenges. Prioritize quality by writing comprehensive unit tests and ensuring adequate test coverage across all components and modules. Demonstrate ownership and end-to-end project delivery with autonomy to make informed decisions and drive projects forward. Champion engineering excellence through architectural best practices, code quality standards, and thoughtful code reviews emphasizing functionality and security. Apply security and compliance mindset, adhering to regulations while safeguarding sensitive patient information. Confidently challenge ideas when necessary while leveraging expertise to improve solutions. Requirements
5+ years of professional software development experience with a proven track record of delivering complex projects and following best practices. Deep experience with modern frontend technologies, specifically TypeScript, React, and CSS-in-JS libraries. Experience implementing frontend architecture best practices such as component systems, npm workspaces, Storybook, and Playwright testing. Experience with Django or similar web frameworks. Familiarity with modern AI-driven development practices and tools. Excited about working in-person with the team in Menlo Park. Nice-to-haves
Previous startup or entrepreneurial experience. Experience driving products from zero to one. Familiarity with healthcare data standards like FHIR and HL7. Interest in engaging with and applying LLMs. Open, transparent culture and collaborative environment with a global vision. Comprehensive benefits, parental leave, and compensation packages typical of the role. About BillionToOne
BillionToOne is a next-generation molecular diagnostics company on a mission to make powerful, accurate diagnostic tests accessible to everyone. Our QCT molecular counting technology enhances disease detection resolution using cell-free DNA, transforming lives worldwide. Our impact includes Unity Complete, an oncology and prenatal diagnostics portfolio, and rapid growth with significant funding and recognition as an innovative employer. We value collaboration, openness, and patient-centric innovation. Headquartered in Menlo Park with facilities in Union City, California, we are advancing the boundaries of molecular diagnostics.
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