Senior Full Stack Engineer(React, Node.JS)

Linus Health is a Boston-based digital health company focused on transforming brain health for people across the world. They are seeking a Senior Full Stack Engineer to drive the design, development, and delivery of complex software systems, collaborating closely with cross-functional partners and mentoring other engineers.

Responsibilities:

• Build full stack applications upon restful services, ensuring performant, scalable, observable, maintainable solution in collaboration with Software Architect
• Lead by example with hands-on coding, code reviews, full stack feature design, while also anticipating long-term challenges such as system performance, technical debt, and evolving technology stacks
• Advance AI-assisted usage by championing best practices and practical applications for ai-assisted code generation ensuring speed gains are paired with validation, security, and reliability
• Uphold best practices for testing (unit, integration, snapshot, e2e), CI/CD pipelines, code quality, and observability in all solutions
• Collaborate with other engineers across projects using excellent written and verbal communication skills with a proactive mindset to deliver on the goals of the team
• Collaborate cross-functionally with Software Architect, Product, Design, Data Science/Medical, and Security to translate requirements into elegant, maintainable solutions that meet our customer’s needs

Requirements:

• 5+ years of software engineering experience with significant expertise in React framework and Node
• 3+ years building restful services including database design in Node
• Strong grasp of modern JavaScript/TypeScript tooling and ecosystems (Webpack, Vite, Babel, ESLint, Jest, Cypress/Playwright)
• Familiarity with AI-assisted development workflows, and proven ability to accelerate development workflows through practical application
• Proficiency in frontend performance optimization (bundle splitting, lazy loading, caching strategies, rendering patterns)
• Strong communication skills—able to drive consensus, document decisions (ADRs, RFCs), and present tradeoffs clearly to technical and non-technical stakeholders
• Experience with mobile development in React Native or iOS/Swift
• Exposure to data visualization libraries (D3, Victory, Recharts, or native iOS charting)
• Previous work in digital health or regulated environments (EHRs, HIPAA, GDPR)
• Experience with Temporal orchestration
• Experience with Aurora Postgres, database design
• Experience / familiarity with Java services