My main skills for mobile app development - Native: iOS, Android(Objective-C, Swift, Java, C#), JNI, NDK (C/C++) - Hybrid: PhoneGap(Cordova/Ionic), Xamarin, AngularJS, Node.js, Titanium (HTML5, CSS3, jQuery Mobile) - Device, Kit: Bluetooth Low Energy (BLE), iBeacon, Credit-Card reader, Apple WatchKit - Back-end service: Parse, Amazon, Twillio, Plivio - Video/audio/image processing: OpenCV, GPU Image, CoreAudio, EZAudio, Pitch Control, Bass, AVFoundation - Speech recognition, text-to-speech, Siri, OpenEar - MySQL, SQLite, Oracle, SQL Server, ODBC - Facebook, Twitter, Linkedin, Instagram, Youtube, Pinterest, Vimeo - Google Map, Core-Location, Geo-Location, GPS, MapKit, MapBox, Open Street Maps - Game Development: Unity3D(C#, J#), Unreal Engine, GoogleCardBoard, Kinect, Oculus Rift, Leap Motion - JIRA, BaseCamp, Github, BitBucket, SVN etc...