Senior Mobile Engineer

About the role Take our web-based self-custodial DeFi product and turn it into shippable iOS + Android apps Build the mobile app in React Native and own it end-to-end — architecture, native integrations, and store release   What you'll do Ship secure, production-grade iOS + Android apps for a financial product handling real user funds Stand up and lead the mobile app in React Native (Expo/EAS) Make passkeys work natively on mobile (iOS Associated Domains + Android Credential Manager) — the make-or-break auth piece Build native integrations: biometrics, secure keystore storage, push, deep links, camera/QR Wire up WalletConnect and wallet deep-linking correctly on mobile Own build/release: signing, CI/CD, OTA updates, and getting through App Store + Play Store review Navigate fintech/crypto store policies and security expectations   Must-have Multiple production mobile apps shipped to both stores, ideally in fintech / banking / payments / crypto Strong React Native experience (Expo, native modules, EAS builds) Deep native fundamentals: Swift/Kotlin enough to write and debug native modules Passkeys / WebAuthn on mobile (Credential Manager, Associated Domains) Security-first mindset — handling keys, secrets, and sensitive user data on-device Comfortable in a TypeScript codebase   Nice to have Capacitor / Ionic or other web-to-native experience Kotlin (native Android) experience Web3 / wallet / account-abstraction background (viem, WalletConnect, ERC Got a crypto or regulated fintech app approved on the App Store Familiarity with our web stack (SvelteKit / Vite)