Hi, I have gone through your project requirement.
I have developed website using various frameworks in php, pyhon, nodejs for backend, and angular2/4/5 for frontend, reactjs(about 1.5 years exp), etc..
I have developed video chatting app using webrtc, kurento, nodejs, etc...
i have developed IM app using nodejs socket.io.
And i worked with jitsi. it also support video chat, developed base on reactjs.
Lets have a short call or chat, We can discuss about project more.
thanks