Enhancing Android Kotlin App Functionality

I'm looking for a skilled Android Developer adept in using Android Studio and Kotlin to incorporate additional functions into my existing project. The main tasks required include making GraphiQL Call to:

Get Access Token
Register Terminal
Create Ticket
Get Menu
Get Menu Products
Update Ticket
Entity Check
Create Entity if not exists
Change Ticket Entity
Add Order
Update Order
Add Calculations
Add Payments
Close Ticket
Unregister Terminal


This project will be a part of SAMBAPOS integration. PLEASE ONLY APPLY IF YOU HAVE EXPERIENCED KOTLIN DEVELOPER!