Overview#
A modern real-time chat application supporting direct messages, group chats, file sharing, and end-to-end encryption. Built with scalability in mind using WebSocket connections and a message queue for reliable delivery.
Tech Stack#
Node.js React MongoDB Socket.io Redis AWS S3
Key Features#
- Real-time messaging with typing indicators and read receipts
- End-to-end encryption for private conversations
- File sharing with drag-and-drop support (images, documents, videos)
- Group chats with admin controls and member management
- Message search with full-text search capabilities
- Push notifications for mobile and desktop
- Online/offline status tracking
Architecture#
The application uses a Node.js backend with Socket.io for real-time communication, MongoDB for message persistence, Redis for session management and pub/sub, and AWS S3 for file storage.