Tech noob here, but for what does grapevine need an API?

Software Engineer

What exactly is the api used for? Use case essentially

Consultant

App is made in react native 
 source: They were hiring for rn devs

Frontend Engineer

If I may ask, @Sunday , how do you know these stacks? Is this public information?

API Type: REST
Backend Framework: DJango (Python).
Web Frontend: Next.js
Analytics tool used for web: Google Analytics, MixPanel
CND Provider: Cloudflare Inc.
Cloud

API Type: REST
Backend Framework: DJango (Python).
Web Frontend: Next.js
Analytics tool used for web: Google Analytics, MixPanel
CND Provider: Cloudflare Inc.
Cloud Provider: Azure.
Database: *NEED HELP*
Push Notification Provider: N/A

Grapevine's Tech stack we know so far: