I have been working in the IT development field for 6 years. For specific, I have 2 years of experience working as a native iOS developer from version 4.3. I am proficient in using Objective-C or Swift language, autolayout and size classes technology with latest version of Xcode to develop iOS universal application. Moreover, I have about 3 years working with native Android, Xamarin,React Native. I am particularly concerned about the experience and suggestions of our customers to more effective programs and upgrade existing applications to make them more useful.