Java, Kotlin, Swift, Objective-C, React Native, Flutter, Xamarin, C++, Dart, HTML5/CSS3 (for hybrid app development), Apache Cordova, Ionic Framework, PhoneGap, Appium (for mobile app automation testing), Espresso (for Android app UI testing), XCTest (for iOS app UI testing), Realm (for mobile database), SQLite, Firebase (for backend and real-time database), ARKit (for augmented reality on iOS), ARCore (for augmented reality on Android), Core ML (for machine learning on iOS), TensorFlow Lite (for machine learning on Android), Push Notifications Services (e.g., Firebase Cloud Messaging, Apple Push Notification Service), Google Maps API, Apple Maps API, Bluetooth Low Energy (BLE) for IoT integration, OAuth and OpenID Connect (for authentication), Jenkins (for continuous integration), Gradle (for Android app build automation), CocoaPods (for iOS app dependency management), Android Jetpack libraries (e.g., Navigation, Room, ViewModel), Swift Package Manager (for iOS app dependency management).
