Mobile Client (native) and App server SDK

Hi Jitsi community,

We are considering Jitisi as our media server for making peer to peer and broadcast video communication.
We learnt that we need to build our own client side SDK and App server SDK.

We are mobile application using native code (not react native) in both Android and iOS.
Please can somebody share their experiences and/or code examples to build these SDKs.
Also please share if there are any pressing challenges or short comings.