i need php and c# xamarin developer for project

I have live website and android apps.. it's like Facebook so its have one website which write in php and app in c# xamarin from its have 2 app one timeline and one mssnger .. I jst want to chng some ui of the apps and also add those extra features in it I m list in below about tht [login to view URL] and video confaresing option with room upto 50 peoples will be free and then users need to pay 9.99 usd for adding more .. its option will available in website and apps both u can use webrtc 2. Video calling and audio calling features will add in website chat box like Facebook also in mssnger app 3. Funny face like snapchat will available in apps only 8 to 10 funny faces will available.. and also short video option like tiktok and in timline app we will add one extra icon in the footer in the app where users can see those videos u can chcked tht Facebook app have it .. like this .. And need to chng some ui in app .. I will let u knw accordingly payment after work becz I m seeing many fake users here .. it's big project and need royal freelancer. we want royal worker.. u have to develope its fast.. thanks..