***NO UPFRONT PAYMENT*** I need to drop a lightning-fast, WhatsApp-style chat component (ONLY 1:1 and Groups chats) into our existing app and keep the server bill tiny while doing it. The front end must be pure React Native, running flawlessly on both iOS and Android, and the back end a lean Node.js + Socket.io service that sticks to efficient WebSocket traffic only. Core behaviour • Real-time 1-to-1 and group conversations, with group creation and management handled in-app. • High-quality media support: images, videos, voice notes, documents/PDFs and direct camera capture. • Sleek, premium UI that instantly switches between dark and light mode. • Modular, well-commented code and clean APIs so I can plug your work straight into my current codebase without refactoring. ***NO UPFRONT PAYMENT*** Performance expectations Everything must feel instant—even on mid-range devices—and keep payloads small so the Node server remains inexpensive to scale horizontally. Timeline & budget Three weeks, fixed at US $3,000. Please bid only if this schedule is comfortable for you. Mandatory demo Link me to a running chat you have already built (APK, TestFlight, repo, or screen-record video). If I can’t tap through a working demo, I won’t be able to consider the proposal. Deliverables - Complete React Native source and assets - Node.js + Socket.io server code with scaling notes - Step-by-step setup & integration documentation - iOS and Android builds (or TestFlight/APK) demonstrating all stated features I will sign off once I can integrate the module, spin up the server, and see snappy, media-rich chats flowing between multiple devices without hiccups. ***NO UPFRONT PAYMENT***