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
Robust 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)

📌 Senior Mobile Engineer (India)
🏢 defi.com
📍 India