Android (3 years), Native Xamarin (2.5 years), iOS (1 year), C/C++ with MVVMCross, MVC pattern.
- Develop Android and iOS app concurrently with the same UI
- Photoshop (cut, edit, create icon, design...)
- Draw charts, animation (any complex level)
- UI/UX concept of Android and iOS (tablet, phone, portrait, landscape, image scale, animation, complex layout, blur effect, popup, image category to each density...)
- Binding Java, C/C++ (JNI) or Object-C/Swift library to Xamarin project
- Robust skeleton/structure and effective architecture. This helps to reduce amount of bugs and avoid from memory leak.
- Common technologies of mobile app: Webservice communication (HTTP/HTTPS, JSON, Encrypt and Decrypt data), Realtime notification (FCM/GCM, APN...), Google map, Camera capture, GPS, Voice recording, Payment SDKs, built-in Webview, Text to speech, Bluetooth/BLE, Social SDKs (Facebook, Twister, Google+), QR/Bar scanner...