What you ll do Architect and build the app from the ground up on iOS and Android using Flutter and Dart. Own it end-to-end — architecture code releases performance and quality. Design for scale with a clean modular layered architecture. Optimize for performance startup time app size and memory. Integrate REST APIs push notifications analytics and crash reporting. Build automated tests — unit widget and integration — as part of how you ship. Instrument for observability (crash-free rate ANR performance) and act on it. Own releases CI/CD signing staged rollouts feature flags and monitoring. Partner with backend on API contracts and with design on polish. Apply fintech-grade security — secure storage cert pinning safe token handling. What we re looking for 2+ years building production mobile apps strong in Flutter and Dart. At least one app live on the Play Store and/or App Store. Solid CS fundamentals — data structures algorithms design patterns. Degree in CS or related field or equivalent practical experience. Deep grasp of Flutter internals (widget tree rendering profiling with DevTools). Strong Dart — async/await Futures Streams isolates null safety. Hands-on with structured state management (Bloc Riverpod or Provider). Comfortable with clean/layered architecture and dependency injection. Experience with REST networking (Dio Retrofit) auth caching error handling. Familiar with native iOS/Android builds signing and platform channels. Strong testing instincts and clean disciplined Git workflow. Nice to have Fintech payments banking or wallet experience (PPI cards UPI). Mobile CI/CD (Fastlane GitHub Actions Codemagic Bitrise). Firebase (Crashlytics Analytics Remote Config Push). Offline-first design and local storage (Hive Drift SQLite). Biometric auth A/B testing feature-flagged rollouts. A feel for motion and craft (Rive Lottie custom painters). Accessibility and internationalization by default. Early/founding mobile engineer at a startup.