Android Outgoing Call Trigger App - Changes in Existing App

I need an Android app that sends an API call when an outgoing call is made.

Requirements:
- Send a REST API call upon outgoing call - Completed

Ideal skills and experience:
- Android app development
- Familiarity with REST APIs
- Experience with call handling in Android

Looking for a developer who can ensure reliable API triggers with minimal delay.

Above same implementation done for incoming call and working in All Android version

Need Android developer having Experience in handling background service using Kotlin and Flutter