| Metric | Value | Context |
|---|---|---|
| App Downloads | 100M+ | Government Emergency App (SafeKorea) |
| Growth Rate | 400% | PointTour event campaign (1K to 5K) |
| Test Coverage | 33.47% | iLity Hub with 299 test cases |
| Languages | 19 | Real-time translation support |
| Production Apps | 7+ | Google Play Store deployed |
Building a better world through technology
- Currently developing iLity Hub - Multi-chain Crypto Wallet & Social Trading Platform at FORLONG Co., Ltd.
- Led Flutter migration of government disaster app with 100M+ downloads
- Specialized in Clean Architecture, Riverpod 3.x, and WalletConnect v2 integration
- AI-Powered Development: Claude Code, Cursor AI, Gemini (30% productivity boost)
Multi-chain Crypto Wallet & Social Trading Platform
| Tech Stack | Features |
|---|---|
| Flutter, Riverpod 3.x, Clean Architecture | EVM Networks (Ethereum, BNB Chain, Base) |
| WalletConnect v2, reown_appkit | 8 Wallet Support (MetaMask, Trust Wallet, etc.) |
| fl_chart, DeFi Integration | Swap/Bridge/Liquidity Pool UI |
- State Machine based 4-step wallet connection flow
- On-chain transaction verification for Trustless Social Feed
- 299 test cases with 33.47% code coverage
Official Government Disaster Safety App - Ministry of the Interior and Safety
| Tech Stack | Features |
|---|---|
| Flutter, Riverpod, MVVM/Repository | Real-time disaster alerts |
| Firebase FCM, Hive, Google Translate API V3 | 19 language translation |
| Flutter TTS, Semantics | TalkBack/VoiceOver accessibility |
Key Achievements:
- Legacy (Java/Objective-C) to Flutter migration
LocationBasedFCMManager: Auto-subscribe/unsubscribe based on locationRegionStabilityChecker: GPS error tolerance (3 validations / 30s cycle)- Priority Queue for emergency message delivery
Llama 3.3 based Smart Emotion Analysis Diary
| Tech Stack | Features |
|---|---|
| Flutter, Groq API (Llama 3.3) | Emotion analysis & personalized comfort messages |
| Firebase, fl_chart | Emotion trend visualization |
| Local-First Pattern | Data persistence before network request |
Key Achievements:
- 4-state overlay UI during 5-10s AI analysis wait time
- 2-step safety filter (input keyword + AI response validation)
- Crisis detection with immediate counseling hotline connection
- Google Play Store v1.4.2 - 6 updates and counting
WalletConnect v2 Protocol Study & Multi-chain Wallet Prototype
- MetaMask, Trust Wallet + 8 wallet support
- Ethereum, BNB Chain, Base EVM network integration
- Android background WebSocket reconnection: Exponential Backoff & Optimistic Session Check
2025.12 ─── FORLONG Co., Ltd. | iLity Hub Multi-chain Wallet (Current)
│
2024.11 ─── Seesun IT | SafeKorea Flutter Migration (100M+ Downloads)
│
2022.10 ─── PlaceLink | PointTour Location-based Rewards App
│
2022.04 ─── DW Academy | Smart Web & App Development Course
Portfolio Projects
| Repository | Description | Tech |
|---|---|---|
| Crypto-Wallet-Pro | Multi-chain Wallet (Clean Architecture) | Flutter, Riverpod |
| MindLog | AI Emotion Analysis Diary | Flutter, Groq API |
| TimeWalker | Interactive History Education Game | Flutter |
| wallet_integration_practice | Multi-chain Wallet Integration Practice | Flutter |
Learning & Experiments
| Repository | Description | Tech |
|---|---|---|
| Native-Lab | Flutter Platform Channels Study | Flutter |
| Flutter_Practice | Responsive UI + i18n (EN/KO/JA) | Flutter, Riverpod |
| Type | Name | Date |
|---|---|---|
| Education | Gongju National University of Education | 2012 - 2019 |
| Course | Inflearn: Claude Code Complete Master | 2025 |
| Course | FastCampus: Flutter with BLoC & Riverpod | 2025 |
| Course | Udemy: Flutter & Dart Complete Guide | 2024 - 2025 |
| Certification | Korean History Level 1 | 2021 |
Built with passion for mobile development and blockchain technology