I need a developer who can add a secure money-out feature to my existing mobile app so users can withdraw their balance directly to their ESEWA wallet. The core flow is straightforward: a user enters the amount, confirms with a PIN or biometric prompt, the app calls ESEWA’s withdrawal API, and we show real-time status updates until the transfer is complete. You should already be familiar with ESEWA’s API endpoints, auth tokens, callback handling, and the standard security practices for e-wallet transactions on Android or iOS. The current codebase is built in Flutter, so I’d prefer to keep the integration in Dart, but I’m open to a native plug-in if a specific SDK requires it. Acceptance criteria • Clean, well-commented code that plugs into my existing balance screen • Successful test withdrawals on ESEWA’s sandbox and production environments • Proper error and timeout handling with user-friendly messages • A short hand-over note explaining any configuration keys and how to re-deploy the build If you’ve implemented ESEWA (or a similar e-wallet) before, please mention it along with links or screenshots of your past work so I can move quickly.