Java, Kotlin, payment integrations, POS SDKs, ISO-8583 messaging, MIFARE DESFire CPU cards, NFC APDU communication, Pax, Sunmi

Solid Principles, Java, Gradle, Performance Tuning, Android SDK, Dependency Injection, Continuous Integration, Kotlin, Git, Oop, Restful Apis, clean architecture, Android UI design principles, Fastlane, Threading, offline storage, reactive programming, Service locator, Android Jetpack

Java, multi-threading, MVVM, Concurrent Programming, Kotlin, Android, Memory Management, Mvc, Jetpack components, Jetpack Compose, performance optimization, Android architecture, Room

Push Notification, Redis, Restful Apis, Android, Kotlin, Kubernetes, Docker, Git, micro-services, cloud message APIs, web load balancing

Unit Testing, Java, Kotlin, Jira, Rxjava, Ui Testing, Git, Rest Apis, CI CD, Kotlin Coroutines, Jetpack Compose

React Native, Flutter, Cordova, Xamarin, Java, Kotlin