Senior Mobile Engineer | Matcha

5+ years of mobile engineering experience with deep fluency in React Native and TypeScript. Proven track record of shipping complex mobile apps - ideally from blank repo to App Store/Play Store. Hands-on experience with modern RN patterns: custom hooks, Zustand/Recoil, Reanimated, FlatList, memoization, and performance profiling. Experience working on crypto wallets or DeFi mobile products (e.g. Matcha, MetaMask, Safe, Uniswap, Phantom, Rainbow, Rabby, Backpack, etc.). You understand key management, signing flows, transaction UX, and Web3 connectivity (WalletConnect, EIP-155). Understanding of native modules and when to use them for crypto or performance-critical tasks (Objective-C, Swift, Java, Kotlin a plus). Strong debugging habits and comfort profiling on real devices across Android and iOS. Familiarity with mobile CI/CD pipelines, incremental rollouts, and feature flagging. Excellent collaboration and communication skills - you think out loud, stay calm under pressure, and embrace feedback. A low-ego, ownership-driven approach to building great products with others. Knowledge and passion for decentralized finance and the 0x mission Exhibit our core values: do the right thing, consistently ship, and focus on long-term impact

Build and ship Matcha’s new React Native app for iOS and Android from the ground up. Design robust architecture, state management, and in-app infrastructure (CI/CD, telemetry, feature flags). Implement high-performance mobile UX - snappy lists, smooth gestures, fast load times, and secure wallet flows. Collaborate closely with design and product to prototype, iterate, and ship features quickly and safely. Write clean, modern TypeScript and React Native code with proper typing, linting, and testing coverage (Jest, Detox/Maestro). Help define the mobile engineering culture - code reviews, pairing, testing discipline, and continuous performance tuning. Contribute to open discussions on design trade-offs and product priorities with a user-first mindset.