I added Socket to facilitate real-time messaging. io, a WebSocket library, into the chat app to use WebSockets for client-server communication. This feature enabled users to directly exchange messages within their chat groups in real time. The backend was designed in a way that could efficiently handle multiple connections, allowing for scalability.
To prepare for scaling, I Implemented Redis as a message broker for communication between multiple Socket. io instances across servers. This provides a degree of scale so that the app can accommodate increasing users and traffic without sacrificing performance. I also implemented means to broadcast events such as updated messages and user actions to all clients connected in a chat room. These optimizations made the chat app stable and ready for scale, paving the way for adding more real-time features such as typing indicators and online/offline status tracking.
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