Android Developer

We are seeking a skilled Android Engineer with experience in NDK and C++ interoperability to build a native Android module that wraps the OpenVPN3 C++ client and integrates with a Flutter plugin. The module should support core VPN operations (connect, reconnect, disconnect, status callbacks) and be delivered as a reusable AAR library.

Responsibilities:

• Integrate the OpenVPN3 C++ client using the Android NDK.

• Build and maintain a JNI bridge to communicate between C++ and Kotlin.

• Implement VpnService for managing VPN tunnels and user permissions.

• Expose required VPN operations to the Flutter layer via platform channels.

• Build a reusable Android AAR for integration with Flutter.

• Collaborate with iOS and Flutter developers to align cross-platform functionality.

Required Skills:

• Strong experience in Android development using Kotlin and C++ (NDK).

• Deep understanding of JNI and native Android integrations.

• Experience implementing Android VpnService and managing runtime VPN permissions.

• Familiarity with building shared C++ libraries (.so) and using CMake in Android projects.

• Solid knowledge of networking concepts and VPN protocols.