Talksy Realtime Chat
Low-Latency Cross-Platform Messenger with Voice Memos & FCM Notifications
Role
Lead Mobile Developer
Platform
Android, iOS & Web
State Management
GetX
Database & Cloud
Firebase Auth
Latency
<50ms
Firestore socket dispatch
Push Reliability
99.9%
FCM high-priority
Frame Rate
60 FPS
Smooth audio waveforms
Platform
Android & iOS
Universal codebase
Problem & Constraints
Achieving instantaneous visual message dispatch while maintaining sync reliability across devices and handling voice recording waveform animations smoothly at 60 FPS.
Technical Implementation
Implemented Firestore reactive socket listeners with optimistic UI state updates for instant message rendering. Integrated Flutter Sound audio encoders with dynamic canvas waveforms and Firebase Cloud Messaging.
Technical Highlights & Innovations
Instant message dispatch using Firebase Firestore sockets (<50ms latency)
Audio voice recording & playback with live waveform visualization
FCM background notifications ensuring zero delayed messages
Read receipts, typing indicators, and user online/offline presence
Key Product Capabilities
Sub-50ms Realtime Chat
Optimistic UI message bubbles render instantly while Firestore sockets synchronize across recipients.
Voice Memo Recording & Waveforms
High-fidelity audio recording with interactive waveform playback and speed toggles.
Media Sharing & Encryption
Compressed image and video sharing with Cloud Storage backend.
System Architecture & Data Flow
Decoupled architecture with reactive streams for real-time conversation synchronization and audio playback.
Chat UI Layer
Custom chat bubble widgets, media drawers, and waveform visualizers.
Audio & Media
Flutter Sound recorder, player controllers, and image compressors.
Real-time Cloud
Firestore snapshot listeners, FCM push triggers, and Firebase Storage.
Tech Stack & Dependencies
Framework
State Management
Backend & Sockets
Push & Audio
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