I have 6+ years of experience in mobile application development with good experience in design as well architecture including iPhone /iPad development (starting from the first beta version of the iPhone SDK-), Android, and Windows mobile development. I have worked on App from concept to launch as well as worked on app upgrades. I am one of the top freelancers in upwork with more than 100+ apps which include many top chart apps and a retail app for a fortune 500 company. I have been developing several mobile applications with common audience about one million people for last many years . I have experience in next areas: convert websites to Android apps via REST API services, chatting, video-streaming, photo editing, geo location, maps. Also I worked with most popular APIs: Twitter, Facebook and more. ? Native: iOS App Development, Android App Development, Windows8 (Objective-C, Swift, Java, C#), JNI, NDK (C/C++), iPad App Development, Xamarin, iPhone App Development ? Web service: XML/JSON, REST/SOAP ? Device, Kit: Bluetooth Low Energy (BLE), iBeacon, Datzing, NFC, credit card reader, MIDI ? Cloud backend: Parse.com, Parse SDK, Parse REST, Parse Cloud Code, Amazon S3 EC2 AWS, Firebase, Foodie, remoteStorage, Twillio, Plivio ? Chat & Messaging Engine: XMPP, Jabber, OpenFire, OpenTok WebRTC, Ejabberd, Erlang ? Media Streaming: Wowza, SoundCloud, Red5, Icecast ? Video/audio/image processing: OpenCV, GPU Image, CoreAudio, EZAudio, Pitch Control, Bass, AVFoundation ? Vector graphics processing: SVG, SVGZ, Illustrator ? Video/audio streaming, codec: Wowza, Red5, H.323, MPEG-4 ? VOIP, Cloud Communication: Twillio, Heroku, Tokbox ? Speech recognition, text-to-speech, Siri, OpenEar ? HTML5, Ruby on Rails, PHP, ASP, JSP, C# and their ? MySQL, SQLite, Oracle, SQL Server, ODBC ? Facebook, Twitter, Linkedin, Instagram, Youtube, Pinterest, ? Google Map, Foursquare, Geolocation, GPS, Open Street Maps ? Augmented Reality: Vuforia, Metaio ? Cocos2D, OpenGL, Corona, Unity3D, Box2D ? Game Center, In-App Purchase, RPG server ? iAd, Adwirl, Revmob, Admob, Chartboost, Tapjoy, Flurry, ? Mantis, JIRA, RedMine, BaseCamp, Huddle, Sprint.ly, Github, ? Cloud services: iCloud, Rackspace, Zoho CRM, Salesforce, ? Enterprise Resource Planning (ERP), Cloud POS, Warehouse ? P2P Payments: Bitcoin, Guldencoin, hivewallet, breadwallet ? Online Payment Gateway: PayPal, Authorize.net, Stripe, Venmo, ? Mobile Game Genre: Casino Slot machine, Poker, Chess, RPG, Arcade less