Mobile App for Cloud Calling Integrating ERPnext and Telephony Service Provider

We are looking for a developer to create a mobile app for cloud calling that integrates ERPnext and a telephony service provider. The app should be compatible with the Android platform and its main function should be making calls. The client has specific designs and features in mind for the app.

Ideal skills and experience for this job include:
- Proficiency in Android app development
- Knowledge of ERPnext and telephony integration
- Strong understanding of cloud calling and telephony services
- Experience in implementing specific designs and features in mobile apps