Linphone and ZeroTier integration and customization

Dear all,
I am seeking mobile APP and software developer to integrate ZeroTier into LinPhone softphones (Mobile APPs ANDROID & iOS & desktop applications for Windows and MAC) . both are opensource and it should be straight forward task , thanks for the available documentations for both , you may find details on

https://docs.zerotier.com/sockets/tutorial.html

https://www.linphone.org/technical-corner/linphone?qt-technical_corner=2#qt-technical_corner

The integration part:
Is simply making ZeroTier embedded into LinPhone
ZeroTier should work inthe backgroud upon launching, and would ask for the "Network ID"
Upon adding the "Network ID" , by default it the connection estabish shall be pending till I authorize the connection "ZeroTier Address or AKA Node ID" from my end, (this connection should be like VPN connection)
By then the client should be ready to enter his SIP credentials as usual

The Customization part:
Just minor branding colouring along with our logo with minor tuning (shall be determined and discussed beforehand)

Your mission will include publishing to the Play Store and the APP store for the mobile APPs