Which frameworks for a live-chat web application?

I want to develop a web-app where users can create an account (login, security-aspects etc. ).
With the app, it is possible to have a live chat like facebook or whatsapp, where the messages are saved in your chat-history. It should also be possible to hold a video-chat conference like skype / ms teams. With sharing screen / stream etc.
What kind of backend and frontend framework should I use?
The app should also be scalable, speaking of easily adding features etc.
I was thinking of Django with ReactJS and some Google-Cloud functions (Database, etc).