custom telegram app

I am looking for a freelancer to develop a custom Telegram app with the following features:

- Chatting, file sharing, and voice/video calls
- The app should be compatible with all devices, including mobile and desktop devices

I am open to suggestions regarding the design elements and aesthetics of the app. The main focus is on functionality and compatibility.

Ideal skills and experience for this project include:

- Proficiency in developing mobile and desktop applications
- Experience with integrating voice/video call functionality
- Knowledge of Telegram API and its features
- Ability to create a user-friendly and intuitive interface