Cross-Platform MERN Web App Development

I'm looking for an experienced developer to create a web app using the MERN stack. The app should be compatible with desktop, mobile, and tablet.

Ideal Skills and Experience:
- Proficiency in MongoDB, Express, React, and Node.js
- Experience in developing responsive and user-friendly interfaces
- Strong understanding of cross-platform compatibility
- Ability to manage and integrate APIs
- Prior experience in deploying and maintaining web applications

Please provide examples of previous work and a timeline for project completion.