About this role
Senior Software Engineer, Digital Experiences at BillionToOne. Location: Menlo Park or Union City or Austin. Role: building applications, mentoring engineers, writing tests Requirements: 5+ years professional software development; deep frontend experience with TypeScript and React; experience with component systems, Storybook, Playwright, npm workspaces; backend experience with Python/Django or Flask; familiarity with AI-assisted dev tools and security/compliance for patient data. Category: Software Development Seniority: Senior Level Tools: Python, Django, Flask, Postgres, React, TypeScript, AWS, Salesforce, Cursor, GitHub Copilot, Claude Code, Codex, Storybook, Playwright, npm workspaces, CSS-in-JS Commitment: Full Time Workplace: Hybrid Languages: English