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Flutter-developer (Crypto Wallet / Web3) at GoMining. Join the core team to design and ship a universal mobile wallet (BTC + EVM), integrate it into our main app via WebView or TWA, deliver secure seed phrase storage, dApp connectivity, and future multi-chain support, with a clean, native-feeling UI focused on Web3 UX.. Responsibilities:. . Build and maintain a production Flutter app for iOS and Android. • Design wallet architecture and the integration with the main app. • Implement Web3 stack — BIP-39, HD wallets, WalletConnect, bitcoin_flutter, web3dart. • Connect analytics, Firebase, push notifications, and secure storage. • Optimize UX, micro-interactions, and performance with a product mindset. • Own releases, CI/CD, builds, and testing. . Tech we use. Flutter, Dart, Bloc or Riverpod, REST, WebSockets, Firebase, Secure Storage or Keychain/Keystore, WalletConnect, bitcoin_flutter, web3dart, BIP-32/39/44, WebView or TWA. . . 2+ years of Flutter experience. . Strong Dart and architecture skills — Bloc, Riverpod, Provider or MVC. . Published apps in App Store or Google Play. . Confident with REST APIs and WebSockets. . Practical mobile security — keychain, secure storage, biometrics. . Able to work autonomously without micromanagement. Nice to have. . Experience in crypto or fintech products. . Web3 integrations — WalletConnect, web3dart or similar, hardware wallets. . HD wallet architecture knowledge — BIP-32/39/44. . Multi-chain wallets — Bitcoin, Ethereum, Tron, etc.. . Embedding Flutter modules in native apps or WebView/TWA integrations. . Strong understanding of Web3 UX and crypto audiences. . Company Location: Georgia.