VanillaJS, Angular, React file uploader

I'm in need of skilled JavaScript developers who are adept in VanillaJs, Angular, and React.

Your job is to develop a file uploader.The file uploaded should handle a server call on init, exchange apiTokens (REST API is provided) and if the token is valid, then display a file uploader button. If the user click on the file uploader he/she can do the following steps within a wizard:

- Select the csv/xls/json file
- Select worksheet (optional)
- Display preview table for the first 6 rows
- Map headers to headers coming from the REST API
- Data validation
- Data upload

Ideal Skills

* Proficiency in JavaScript, particularly VanillaJs, Angular, and React
* Experience in developing file uploader libraries
* Able to work on an exciting and urgent project
* Knowledge in file upload functional elements
* Clean code

Full brief: https://forested-girl-58c.notion.site/Brief-e4dc9d91355948d59112c3c689cbad3d?pvs=25


Let's discuss more on maximizing this opportunity.