Saas Application for Schools (Web + Mobile)

I want to build a school portal that work like on hosted ERP Web, Android & ios)

Users will be able to buy a plan, which will create a subdomain (123.chaff.com) with assigned volume e.g 2GB.
This wil give users the access to the school app with all modules specific to the users and hs school only.
user will be able to upgrade/downgrade its plan.
Themes will be created and user can select which theme is relevant to its account (Basically color theme)

Each user account will choose from the pre created payment gateways to receive regisration from its users
Admin can decide to keep registration open or closed.

In-app messaging system
Chat system
Gallery

There are other modules that will be discussed to selected Developer

You must have experience developing SaaS Products and show me sample website where you created subdomain from frontend.


It is ideal that you have experience below to deliver this project.

WebRTC+Kurento
Swift for Native iOS application
Kotlin for Native Android application
React.js/HTML5 for the admin panel
Node.js for the server-side
Socket.io for real-time features and Chat
MongoDB for database