Full Stack Web App Development

I'm looking to hire a Full Stack Developer to build a complete web application using React, Node.js, and MongoDB. The application can be an eCommerce site, portfolio, or admin dashboard.

Requirements:
- Frontend Development: React.js, HTML5, CSS3, Tailwind CSS, JavaScript
- Backend Development: Node.js and Express.js
- Database Integration: MongoDB or MySQL
- RESTful API Development and Integration
- Authentication Integration: JWT or OAuth
- Deployment to Vercel, Netlify, or Heroku

Ideal Skills and Experience:
- Proven experience in full stack development
- Strong knowledge of the MERN stack (MongoDB, Express.js, React.js, Node.js)
- Familiarity with authentication methods (JWT, OAuth)
- Ability to deliver clean, mobile-responsive, and user-friendly interfaces

Please provide examples of previous work and a rough estimate of the development timeline.