i need xamarin c# and php developer

I need you to develop some software for me. have existing website and app android.. website in php and app in c# xamarin I want to add those features in those exciting apps and website Website in php and app in c# xamarin.. I have 2 app one time line and mssnger . 1. Live option in website and timeline app and video confaresing in website and timeline ... 50 peopels can join and if they want extra then they need to pay 9.99$ . Podcast also 2. Video calling and voice calling in mssnger app ... 3. Funny face 10 frm there 2 to 3 will be add in app in purchase..1$ in timeline camera and in mssnger when video calls ... 4. Short video in timeline app and its will be show in website also ... if users get 1000 like in short video then they will get fund 0.5$ automatically..need to chnge ui of app .. paymnt aftr work .. please if u are experienced then bid .. otherwise not I need it within short time like 3 to 4 days .. thanks