Senior Software Engineer, BillionToOne

• If you have experience performing in a full life-cycle development, love seeing your work positively affect your colleagues and patients, and thrive in a fast-paced entrepreneurial environment, this could be a great opportunity for you
• 5+ years of professional software development experience with a proven track record of delivering complex projects and adhering to best practices
• Deep experience with modern frontend technologies, specifically with Typescript, React, and CSS-in-JS libraries
• Have implemented frontend architecture best practices such as component systems, npm workspaces, Storybook, and Playwright testing
• Experience with web frameworks such as Django
• Familiarity with modern AI-driven development practices and tools
• Excited about working in-person with our team in Menlo Park

Desirable

• We are currently looking for a high-performing Senior Software Engineer, Digital Experiences to join our dynamic software engineering team. Software engineers at BillionToOne work in highly collaborative and interdisciplinary teams of clinicians, computational biologists, and other engineers to robustly scale personalized genomic medicine to millions of patients
• In this role, you can have an impact both through many small tools and large product development
• Projects you may work on include:
• Build a seamless digital experience so clinicians and patients across a diversity of care centers and socioeconomic status can have access to BillionToOne’s highly complex genetic testing
• Help digitize laborious and error-prone paper-based workflows at busy Oncology clinics
• Enable better transfer of care through portable electronic medical records
• Technologies we use include: Python, Django, Postgres, React, Typescript, AWS, Salesforce, and emerging AI-assisted coding environments (e.g., Cursor, GitHub Copilot, Claude Code)
• 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 and out-of-the-box mindset, offering innovative solutions and approaches to complex technical challenges
• Prioritize quality by writing comprehensive unit tests and ensuring adequate test coverage across all components and modules
• Demonstrate a strong sense of ownership and take responsibility for end-to-end project delivery. The ideal candidate will thrive in an environment where they have the autonomy to make informed decisions and take the initiative to drive projects forward
• Champion engineering excellence through architectural best practices, code quality standards, and thoughtful code reviews that emphasize both functionality and security
• Apply a security and compliance mindset ensuring adherence to relevant regulations while implementing appropriate safeguards for sensitive patient information
• Confidently challenge ideas and assumptions from stakeholders when necessary, while at the same time, leverage their expertise and insights to improve the overall solution