Hello. I read your requirement carefully. I have interested in this project really.
I have developed many offline, online multiplayer games for Android and IOS, WebGL, PC in Unity3D (C#) for 5 years.
I also have enough knowledge of ARkit.
I can't share all my products more than 30 here, but I will show you my amazing skills and products whenever you want.
My backend skills are Nodejs, MongoDB, PHP, MySQL and I have made the servers with these skills in Amazon.
I also have experiences to integrate Photon Service, ADS and SNS, InAppPurchasing, Leaderboard.
Please contact me anytime when you have interested in me.