Mobile Software Engineer - Android Mobile development

Android Mobile development- .   Java or Kotlin for Android. You also need to understand the basics of mobile design, such as layouts, navigation, icons, and responsiveness.
Android Mobile testing  different types of testing, such as unit testing, integration testing, usability testing, security testing, and performance testing. You also need to know how to use testing tools, such as emulators, simulators, debuggers, and automation frameworks. For example, you might use Xcode or Android Studio for debugging, Appium or Espresso for automation, or Firebase or TestFlight for distribution
Mobile design - use design principles, such as color, typography, alignment, and contrast. You also need to know how to use design tools, such as Sketch, Adobe XD, or Figma
Mobile analytics - use analytics tools, such as Google Analytics, Firebase, or Mixpanel