CLI tool for processing massive data to MongoDB

Searching for a developer (or a team) who can help me with creating a tool that can:

- scan through folders to find files
- scan the content of each file and separate each item by a given parameter
- save data to MongoDB
- generate additional data based on the found items in the files. This can be prepending, appending or hashing of that data.
- check for existing data and update if needed

Other requirements:
- should be a CLI tool
- preferred teck stack is MERN, so probably needed to use NodeJs for the CLI tool. Python is also possible
- MongoDB is the preferred database
- List of plugins that are required
- No paid plugins
- Clean code
- Source code included service

The attached file contains more detailed information.