Build an auto dialler + recording app in Native to work with my react native app -- 2

i need to build a Native dialler product that works from my react native CRM app .it should have the following functionality .

edit time gap duration between consecutive calls
controls for next call,pause call
start and stop auto dialler
keypad
auto voice recorder
calls list in CRM with same behavior as leads
employee online/oflline/break/inactive for x minutes
transfer call to an agent
live whisper barging for VoIP calls
mute/speaker/hold/transfer/start recording/stop recording controls /add call/duration/call status/name of the person called/company called.hangup