Build a random chat web application that can be sortable by gender and location and age

We need help to build a responsive web based chat application. When user logs in they choose a username, 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. 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 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. 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.