Android VPN App Upgrade - 16 KB Memory Page Support (ICS OpenVPN Based)

Looking for an experienced Android developer to upgrade and modernize an existing VPN Android app based on ICS OpenVPN.

Main goal is to make the app fully compatible with latest Android versions and support 16 KB memory page size devices.

Tasks
Fix and upgrade old Android project
Update Gradle & dependencies
Fix build errors and deprecated APIs
Rebuild/fix native VPN libraries (.so)
Ensure 16KB page size compatibility
Verify VPN connection works properly
Generate working APK & AAB
Skills Required
Android Studio
Java/Kotlin
ICS OpenVPN / OpenVPN Android
Android NDK
Gradle migration
VPNService API
Native library handling
Important

Project source code already exists.
Need someone experienced with VPN apps and legacy Android project upgrades.

Please share:

Similar VPN projects
Android NDK experience
Estimated timeline & cost