• 🔭 Building production SIP + WebRTC calling systems in Flutter
• 📡 Deep hands-on with FreePBX, dart_sip_ua, flutter_webrtc, LiveKit
• 🤖 Building a local AI system with document + web search (offline-first)
• ⚙️ Background: Mechanical → Product Design → Software Engineering
• 🌍 Contributing to the open-source tools I use in production

• Production SIP + WebRTC systems in Flutter
• CallKit (iOS) + Telecom API (Android) deep integrations
• VoIP call queueing, reconnection & background handling
• Local AI developer assistant with document + web search
• Real-time communication architecture

• Merged 4 OSS contributions into production-used Flutter/WebRTC packages
• Built production VoIP workflows using SIP + WebRTC
• Integrated iOS CallKit and Android Telecom APIs from scratch
• Debugged native Swift ↔ Flutter plugin interop issues
• Worked on call queueing, reconnection, and background call handling

fix(iOS): actionCallAccept emits empty data on outgoing calls — #813 ✅ Merged

• Traced a data corruption bug in CXAnswerCallAction triggered via setCallConnected()
• self.data singleton was overwritten with empty defaults before the event fired
• Fixed by reading from call.data (persisted on the Call object) instead — 2-line surgical fix
• Affects all outgoing calls; incoming calls were unaffected due to different code path

Swift iOS CallKit Flutter plugin internals VoIP lifecycle debugging

fix(android): prevent screen turning off during active video calls — #1057 ✅ Merged

• Screen timeout during active video calls caused UX interruptions on Android
• Added native MainActivity window flag handling to keep screen awake during calls
• Flags enabled when room is active, cleared on room disposal
• Used SDK-internal lkPlatformIs guard per reviewer feedback (not Platform.isAndroid)

Kotlin Android Flutter LiveKit Native platform integration

Fixed spelling typo in audio settings UI — #942 ✅ Merged

• Corrected "Micriphone" → "Microphone" in example app audio device settings UI
• Tested on Android emulator and physical device

Flutter LiveKit UI polish

fix: persist ws_uri in _saveSettings for proper SIP registration — #542 ✅ Merged

• ws_uri was missing from _saveSettings, silently ignoring the user-entered WebSocket URL
• App always fell back to the hardcoded wss://tryit.jssip.net:10443 regardless of input
• Added the missing persistence line — unblocks custom SIP server registration

Dart SIP WebRTC dart_sip_ua WebSocket

• Working on production-level VoIP applications
• Implemented SIP calling using dart_sip_ua
• Integrated CallKit (iOS) and Telecom APIs (Android)
• Handling real-time communication systems end-to-end

• Flutter + SIP + WebRTC calling system
• CallKit (iOS) + Android Telecom full integration
• Real-time voice/video with background call handling

• Fully offline knowledge system
• PDF + web search integration
• Developer productivity tool

• SIP signaling & VoIP infrastructure
• WebRTC media pipelines
• CallKit / Telecom framework internals
• Native iOS (Swift) ↔ Flutter plugin interoperability
• Local AI systems & retrieval pipelines
• Offline-first developer tools

Flutter Dart Swift Kotlin SIP WebRTC FreePBX
LiveKit CallKit Android Telecom Firebase REST APIs
Python Blender Fusion 360

⭐ Contributing to the real-time communication infrastructure I build on every day.