Senior Full-Stack Engineer • React/TypeScript for Care Tech

Vynca Inc.; San Mateo (CA); Hybrid; USD 140,000 - 190,000; Full time

Job summary

Vynca Inc. in San Mateo, CA is seeking a Senior Full Stack Engineer with 5+ years in building production-grade web applications. You will own end-to-end features across a modern stack (React, TypeScript, FastAPI) and collaborate with design, product, and engineering to deliver secure, scalable software for high-touch care.

Join a hybrid team and contribute to impactful healthcare outcomes while working with a strong ownership mindset and modern tooling such as GraphQL, SQLAlchemy, and Pytest.

Qualifications

• Bachelor’s degree in Computer Science or related field (advanced degree preferred).
• 5+ years of experience in full stack or frontend/backend development roles.
• Proficient in React and TypeScript.
• Experience integrating GraphQL and REST APIs.
• Familiarity with backend frameworks such as FastAPI or similar.
• Knowledge of relational databases (PostgreSQL, MySQL) and ORMs like SQLAlchemy.
• Comfortable with git, monorepos, and Yarn or similar package managers.
• Testing experience on both frontend (Vitest, Testing Library) and backend (Pytest).
• Experience working in Agile teams using Jira and Scrum ceremonies.

Responsibilities

• Design and implement GraphQL and RESTful APIs using FastAPI and Strawberry GraphQL.
• Build and maintain backend services to support UI features, authentication flows, and patient/provider workflows.
• Model data with SQLAlchemy and manage schema changes with Alembic.
• Integrate with third-party APIs (e.g., HealthGorilla, Salesforce, PVerify, Google APIs, Slack).
• Write unit and integration tests using Pytest and testcontainers.
• Maintain API security, access control, and logging practices.
• Event driven architecture, CQRS design patterns, HAPI FHIR Server, Full Text/Fuzzy Search & Semantic Search.
• Frontend (React + TypeScript): Build and maintain features in a React + TypeScript codebase with functional components and hooks.
• Implement responsive UI components using Material UI (MUI) and Emotion.
• Manage client-side state using Redux Toolkit, Formik, and Yup.
• Integrate with backend services via GraphQL (Apollo Client) and REST APIs (Axios).
• Handle authentication flows with Auth0.
• Build protected routes with react-router-dom.
• Write unit and integration tests using Vitest, React Testing Library, Playwright and MSW.
• Implement features like file uploads, PDF generation, digital signature capture, and custom surveys.
• Use LaunchDarkly for feature flagging and Vite for builds and local dev.

Skills

React

TypeScript

GraphQL

REST APIs

FastAPI

SQLAlchemy

Relational databases

PostgreSQL

MySQL

Git

Monorepos

Yarn

Testing - frontend

Vitest

Testing - backend

Pytest

Jira

Education

Bachelor’s degree in Computer Science or related field

Tools

GraphQL

REST APIs

FastAPI

Strawberry GraphQL

Apollo Server

HAPI FHIR

PDF handling

Typesense

Slack bots

Job description

Vynca Inc. in San Mateo, CA is seeking a Senior Full Stack Engineer with 5+ years in building production-grade web applications. You will own end-to-end features across a modern stack (React, TypeScript, FastAPI) and collaborate with design, product, and engineering to deliver secure, scalable software for high-touch care.

Join a hybrid team and contribute to impactful healthcare outcomes while working with a strong ownership mindset and modern tooling such as GraphQL, SQLAlchemy, and Pytest.