I have been working as professional Android Developer since 2014 and developed more that 50 applications and many of them are on Play Store. I can help you develop Android Application using Java/Kotlin using latest Android build tools and Android studio, If you want to update your old Android application i can also help you update application without breaking the logic. Further more i can also help integrate Google Maps, Firebase, Admob and other third party services and API's Tools: Android Studio Android SDK Java/Kotlin Google Maps Google Firebase Google Firebase Analytics Google AdMob Parse Mapbox (Map, Routing, Styling) OkHttp Retrofit Picasso