Android App Finalization – Google Auth, Push Notifications & Subscription Integration (Expo + RevenueCat)

I have an Android app that is already developed and functional. I am now looking for an experienced developer to help finalize the app by integrating key features and preparing it for a successful Google Play Store launch.

Scope of Work

The main tasks include:

Google Authentication Integration
Implement secure Google Sign-In for user login and account management.
Push Notifications Setup (Expo)
Integrate Expo push notifications to send real-time alerts and updates to users.
Subscription & In-App Purchase Integration
Set up Google Play Billing and integrate subscriptions using RevenueCat for easy management of purchases and user access.
Testing & Debugging
Ensure all integrations work smoothly across different Android devices and OS versions.
Play Store Deployment Support
Assist with:
Generating signed APK/AAB
Setting up the Google Play Console
Uploading the app
Configuring in-app subscriptions
Final publishing
Deliverables
Fully working Android build (APK & AAB)
Integrated Google login system
Working push notification system (Expo)
Functional subscription system (RevenueCat + Google Play Billing)
Clean and well-structured source code
Support for Play Store submission and approval
Requirements
Strong experience with Android development (Kotlin/Java or React Native with Expo)
Experience with Google Authentication & Firebase
Hands-on experience with Expo Notifications
Prior work with RevenueCat and Google Play Billing
Experience publishing apps on Google Play Store
Workflow

We will start with a quick discussion where I will explain the app, current setup, and required integrations. Regular updates will be expected during development.

Goal

To make the app fully production-ready with authentication, notifications, and subscription system, and successfully publish it on the Google Play Store.