Chinese or Ukraine mobile developer

i am looking for experienced Chinese or Ukraine mobile developer to create a long term relationship and develop android and iphone apps for me, here are basic features of apps: - develop native apps for iphone and android, app will be used to download videos from any video site / social network / CDN or video network, user can enter URL and when he plays any video it will show a download popup or show download icon. - user can download multiple videos at same time in background - as iphone users can use app only to download videos but android user will get popup alert to download video when they play any online video in any browser in their android phone - in app purchases to go pro - video file management - tabs will be browser, download, files, playlist, settings - video playlist sharing to other media, or TV - play videos or playlist as video or as music only - use parse as backend to store user data i need a long term developers who can work with me and show stunning products so we can give them more work budget is $850