Web3 Cloud Mining App Development

I need an experienced developer to build a web3 cloud mining app for Android.

Minimum Viable Product (MVP) features:
- Login/Register (with Firebase Auth)
- "Start Mining" button (simulated start)
- Mining Dashboard (e.g., tokens earned, hash rate)
- Rewards screen
- Wallet (for future payout)
- Admin panel (optional - web-based)

Tech Stack:
- Frontend: Flutter (Dart) or Android (Kotlin)
- Backend (API): Node.js
- Database: Firebase Firestore
- Auth: Firebase Authentication
- Ads: Google AdMob, Unity Ads
- Notifications: Firebase Cloud Messaging (FCM)

Ideal Skills and Experience:
- Proficiency in Android app development
- Strong knowledge of Node.js and Firebase
- Experience with ad integration and cloud messaging

Please provide your best quote and timeline.