Expert Android Consultant

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