we need to build a cross platform chat app.
features
1. phone number authentication by sms
2. roaster list
3. chat
4. group chat
5. file transfer
6. video/audio record and tranfer
look at kakao and whatsapp
only bid if you have done similar....you know nodejs, socket io, openfire, xmpp, ejjabered etc
no need to write big cv, just send link of similar app and we will interview you.