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Jin cheng

iOS/Android App Expert

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Beijing, China
Joined May 11, 2020

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English
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Basic
About
Thank you for your interesting for me. Advantages - iOS developer since 2012, Android developer since 2014, Mac developer since 2015 - All projects successfully completed - Clean, robust code IOS SKILLS - Swift, Objective-C, C++ - UIKit, CoreGraphics, CoreAnimation, TextKit, AsyncDisplayKit - Firebase: Database, Authentication - Location Services, Camera and Photo Library, Accelerometer - In-App Purchases: StoreKit, Receipt verification with OpenSSL - Audio & Video: AVFoundation, AVKit, HTTP Live Streaming (HLS), FairPlay DRM - Accessibility: VoiceOver, Dynamic Type - Social: OAuth login (Facebook, Google) - Networking: NSURLSession, Alamofire, BSD sockets - Messaging: iMessage extensions - iCloud sync - Advanced SQLite - XML Parsing - Cordova plugins - CocoaPods, Carthage, fastlane (snapshot, deliver) - Instruments, HTTP/HTTPS trafic sniffers - Xcode build scripts, xcconfig - iTunes Connect Full-Time Communication: I usually work full time, so you will get my response anytime when you need to discuss anything. It’s not mean that I did not sleep, I work based on Client’s time zone. It is very important to success. High Quality: I don’t explain anything about it. Because I have to prove it through working and passing the project. Keeping Deadline: I prefer to work to a deadline. In whichever project I am work, the importance of keeping deadline is essential. Because it should be set based on Right Understand of client’s concepts, Enough Knowledge, and Rich Experience. Look forward to work with you. Best Regards.