Node.js Gmail API Automation

I’m looking for a Node.js developer to build a lightweight Gmail API script using OAuth2.

Requirements:
Authenticate via OAuth2 with automatic token storage/refresh
Retrieve unread inbox messages only
Parse full email bodies and MIME payloads
Extract all attachments and store them in variables
Log processed email content to the console
Mark successfully processed emails as read
Use async/await, minimal dependencies, and proper error handling
Run with a simple npm start

Deliverables:
Clean, commented Node.js source code
package.json and .env configuration
Short README covering Google Cloud/OAuth setup and usage

Please include your estimated turnaround time and relevant Gmail API experience. ASAP delivery preferred.