Work on integrating chat features in our existing application.
1. One-to-one fully secure real-time messaging
2. Group messaging. Group admins will have the following features: Not allowing users to add more people to the group. Not allowing users to save or share the contents sent on the message. Users not being able to send msg to other members of the group
3. Allowing users to join a group or a chat through a link
4. Allow users to send msgs or videos or voice recordings.
5. Providing a few other proprietary features.
Looking for a person who can design and implement the entire backend system to ensure the system is scalable to about 1 million concurrent users.