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About this App
Draw, doodle, and create freely — your canvas, your rules
Draw it is a real-time collaborative canvas application developed using Flutter for the frontend and Node.js + Express with WebSocket for backend synchronization. The app allows multiple users to draw simultaneously on a shared board, demonstrating expertise in both cross-platform UI development and real-time network communication.
🚀 Key Objective:
Enable seamless, real-time collaboration on a shared drawing board using a performant, event-driven architecture.
🧱 Tech Stack:
Flutter (Dart): Cross-platform mobile frontend with gesture handling and custom rendering
Node.js + Express.js: Backend server with WebSocket support for persistent bi-directional communication
WebSocket (ws): For real-time synchronization of strokes across users
CustomPainter: Efficient frame-by-frame drawing on canvas
Permission Handler & RepaintBoundary: Save drawings as images on device
🖌️ Core Features:
✍️ Shared Real-Time Drawing: All participants see each other's strokes instantly using WebSocket broadcast.
📡 Stateless WebSocket Server: Lightweight Node.js server maintains active socket connections and relays stroke events with low latency.
🎨 Canvas Engine: Touch gestures are converted into drawable vector paths and rendered using Flutter's CustomPainter.
📁 Export Canvas: Users can save their artwork as an image
🔧 Modular Architecture: Separate layers for drawing logic, server events, and platform integration.
