Create a webbased random text and video chat application

We need help to build a responsive web based chat application. When user logs in they choose a username (or can register one), then they will be connected to a random person who is also actively using this same app. They can choose to stay and continue to chat with that person, or move onto the next person by clicking a button. When the user clicks next, he should not be connected to the same user he has previously skipped unless clicks a button to clear this. Kind of like chatroulette. It will always be random. We would also like a user to be able to filter other users by age/gender/country so it will only search for other users within their desired filter. We can add a webcam feature (WEBRTC) and a file upload feature. The chat application should also have some security and allow users to report other users, and also allow us to block IPs. Users should also be able to block users, so when they try connecting to another person, the same person won't come back to chat with them. Again, this should be able to clear by the user in case they make a mistake to block someone. Finally, we need a nice designed front end and login box. We can show you some sample websites that we have seen this type of application on for reference. The chat should include smaller UI features such as font selector, smileys and profile picture uploading with a small profile box for personal details to share with others. We are open to technology used but should be SEO friendly. The database can be Mongo or Mysql (or any other recommended. React.js, [login to view URL], node.js are all ok. Open to suggestions