Mobile & Desktop:
  - Android Native (Kotlin, Java, Jetpack Compose, XML)
  - Flutter
  - Kotlin Multiplatform

Architecture:
  - MVVM, MVI, Clean Architecture, Repository Pattern, Multi-module architecture
  - Hilt, Koin for Dependency Injection 
  - Room, DataStore, SharedPreferences, Coroutines, Flow, Rx,

Networking:
  - REST (Retrofit2, OkHttp, Ktor)
  - GraphQL (Apollo)
  - WebSocket (OkHttp, Ktor)

Testing:
  - MockK, Mockito
  - JUnit 4
  - Robolectric
  - Espresso, UI Automator

Performance & Optimization:
  - Proguard/R8
  - App Bundle optimization
  - Memory profiling tools

CI/CD:
  - GitHub Actions
  - Fastlane
  - Circle CI
  - Jenkins

Monitoring / Debugging:
  - Google Play Console
  - Firebase Crashlytics, UXCam
  - Flipper, Chuck
  - LeakCanary

Tooling / Dev Productivity:
  - Gradle KTS
  - Cursor
  - Git, GitHub CLI
  - GitHub Copilot
  - Postman, Swagger

Android Libraries:
  - Firebase
  - Google Ads, Applovin Ads, Facebook Ads(Meta Audience Network)
  - Google Analytics, Adjust, Segment, Amplitude, Braze
  - ExoPlayer, Glide, Picasso, Coil, Lottie
  - WorkManager
  - GSON, Moshi
  - CameraX, ML Kit
  - Google Play Billing