We are looking for Expert Android Consultant who will work on a project for major bank on a Polish market.

Requirements:

•  Minimum 6 years of commercial experience in Android mobile application development using Kotlin.
• Hands-on experience with Android SDK, Android Studio, AndroidX, and Material Components.
• Ability to develop applications targeting the latest Android version while maintaining backward compatibility with older Android versions.
• Knowledge of Java.
• Experience with MVVM architecture, including ViewModel, LiveData/StateFlow, and Navigation Component.
• Good understanding of Clean Architecture and layered architecture principles (UI, Domain, Data).
• Experience working with multi-module applications, including practical knowledge of separation of concerns and component isolation.
• Strong understanding of reactive and asynchronous programming.
•  Very good knowledge of RxJava3, including error handling, schedulers, and chaining.
•  Knowledge of Kotlin Coroutines and understanding of the differences between reactive and coroutine-based approaches.
• Experience in implementing data flows using LiveData, Flow, StateFlow, and similar mechanisms.
• Experience in writing unit and integration tests using Mockito, MockK, PowerMock, and JUnit.
•  Good understanding of code coverage, module testability, and component testability.
• Experience with backend integration using REST and SOAP, as well as OkHttp and Retrofit.
• Experience with libraries and frameworks such as Firebase, Lottie, Android Architecture Components, Room, and WorkManager.
• Experience with CI/CD processes, including Jenkins and GitLab CI.
• Experience with development and debugging tools such as Debugger, Android Profiler, and Layout Inspector.
• Ability to profile Android applications in terms of CPU, memory, and battery usage, as well as optimize UI performance and resource consumption.
• Fluency in Polish
• Good knowledge of English

Duties:

• New features development
• Automated testing
• Backend and API integration
• Creation of documentation
• Cooperation with team and stakeholders on Client's side