Management of SIP - VoIP video intercoms with Python

Our company is developing its new home automation system and among the novelties it wants to introduce the direct management of SIP - VoIP video intercoms (through the local Ethernet network). The home automation system is written in Python3.8 and uses PyQt5 as a user interface (a knowledge of classes such as QMediaPlayer is therefore essential). The hardware is a PC-All-In-One with Intel i5 7350U 16GB RAM 128GB SSD processor, the operating system used is Linux distribution Ubuntu 20. We are looking for experienced programmers in this area to assist one of our technicians in the development of this part.