• Development and maintain SDK, which is used by banks in POS-terminals/Android smartphones: - Java/Kotlin - RxJava/Coroutines/Java concurrency - MinSdk 22+ - Maven Publication, JFrog, Jenkins CI - Multiproject, multimodule architecture• Integration SDK in UI project• Implementation and application of cryptographically strong algorithms approved by NIST• Implementation of security features, such as protection against overlap, periodic checks for hacking• Implementation of payment via QR• Rewriting the printing library from text view to pictures

• Full development and maintain of the application for the sale of petroleum products: - Kotlin, RxJava, Dagger, MVVM, Clean Architecture• Full development and maintain of the dating application via bluetooth: - Kotlin, Coroutines/Flow, Dagger, Jetpack Compose, MVVM, Clean Architecture• Development and maintain of a voice assistant: - Kotlin, Coroutines, RxJava, Dagger, MVVM• Development and maintain of the messenger: - Kotlin, RxJava, Dagger, MVVM