Senior Full Stack Engineer I (React, Node.JS)

Linus Health•Boston, MA

4d•$155,000 - $165,000

About The Position

As a Senior Full stack Software Engineer I, you will be a core team member responsible for driving the design, development, and delivery of complex software systems. By combining deep front end technical expertise with strong backend api design abilities, you will drive secure, performant implementations with your fellow team members toward high-impact outcomes. You will influence api and database design decisions, front end technical direction, and ensure the scalability, reliability, and maintainability of software solutions. You will collaborate closely with cross-functional partners—including product managers, designers, and other engineers—to align technical initiatives with business goals. You will also mentor and coach other engineers, fostering growth, best practices, and a culture of technical excellence within the organization. This position is for a Senior I FS Engineer, not a Senior II or Staff. Salary expectations must be within the range included in the job post.

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.

Nice To Haves

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.

Responsibilities

Build full stack applications upon restful services, ensuring performant, scalable, observable, maintainable solutions 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.
Communicate technical tradeoffs and risks candidly across teams.
Guide design choices using data, metrics, and long-term thinking.
Uphold high standards for API responsiveness, production observability, and customer data privacy in every decision.
Enable engineers to succeed through mentorship, documentation, and open collaboration.
Set exemplary standards for API quality, performance, and maintainability (including AI-assisted workflows).
Lead bold initiatives like public API development that transform how we interface with the broader healthcare ecosystem.