[Remote] Crypto Wallet developer (mobile)

**JOB DUTIES** - Mobile Development: Design and maintain the platform's dedicated mobile wallet using React Native, ensuring a consistent and premium experience on both iOS and Android. - Security Infrastructure: Implement and operate secure, non-custodial key management systems using BIP39/BIP44 standards and encrypted local storage solutions. - Wallet Connectivity: Integrate and optimize WalletConnect v2 to allow the mobile wallet to act as a secure signer for our web-based marketplace and battle arena. - Onboarding & Identity: Develop seamless "social-to-wallet" onboarding flows and integrate KYC/KYB providers for regulatory compliance and user verification. - Cross-Chain Support: Implement multi-chain functionality to manage assets across Ethereum, Polygon, Arbitrum, and Base, including real-time balance tracking and transaction history. - Biometric Integration: Utilize native device features (FaceID, TouchID, Fingerprint) for secure transaction signing and app access. - Performance & Latency: Monitor and optimize transaction broadcasting and signature speeds to ensure 24/7 reliability for high-volume game actions. - Collaboration: Partner with the Smart Contract and Blockchain Infrastructure teams to ensure secure and efficient interaction with our on-chain protocols. **JOB REQUIREMENTS** - **Experience** : 3+ years in software engineering with a heavy focus on **mobile development** and secure financial or crypto applications. - **Security Mastery** : Deep understanding of **cryptographic primitives** , private key derivation (BIP32/44), and secure storage patterns on mobile OS. - **Framework Proficiency** : High proficiency in **React Native** , **TypeScript** , and **Ethers.js / Viem** . - **Native Depth** : Hands-on experience bridging React Native with **native modules (Swift/Kotlin)** for custom security or performance features. - **Mobile Infrastructure** : Familiarity with **App Store/Play Store** deployment pipelines and automated CI/CD for mobile apps. - **Communication** : Ability to document complex security architectures and user flows for a remote, global engineering team. **Preferred Skills** - **Push Notifications** : Specific experience with Web3-native notification protocols (e.g., Push Protocol) for transaction alerts. - **Compliance Integration** : Knowledge of integrating third-party identity providers (Sumsub, Onfido, etc.) for **KYC/KYB** .