Senior Android Developer (Part-Time)

About the RoleWe are looking for an experienced Senior Android Developer to join our team on a part-time basis. This role combines the development of an Android mobile application with the design, evolution, and maintenance of Android SDK components consumed by multiple applications.The mobile application serves as a companion app for a medical device, enabling users to interact with the device, manage its functionality, and access healthcare-related workflows through a secure and intuitive mobile experience.Additionally, the role will involve modernizing the existing application and technology stack, including migrating to Jetpack Compose for UI development and gradually transitioning from RxJava to Kotlin Coroutines and Flow.Responsibilities· Design and maintain Android applications and reusable SDK modules.· Develop BLE integrations and device connectivity solutions.· Build and maintain networking layers using Retrofit and OkHttp.· Maintain and evolve Dependency Injection architecture based on Koin.· Contribute to UI development using Android Views and Jetpack Compose.· Lead the modernization of the Android application architecture and technology stack.· Plan and execute migration initiatives from Android Views to Jetpack Compose.· Drive the transition from RxJava to Kotlin Coroutines and Flow.· Ensure backward compatibility and smooth adoption of new technologies across the application and SDK ecosystem.· Maintain technical documentation, testing strategy, release processes and code quality standards.Required Skills & Experience5+ years of Android developmentFluency in English, with the ability to work effectively with technical documentation.High level of ownership and independenceExperience in Android SDK design and implementationBackward compatibility managementIoT devices integration over BLESoftware architectureKotlinGradle multi-module projectsRetrofitOkHttpRxJava 2Kotlin Coroutines & FlowKoinJUnit and MockKDetektNice to HaveJetpack ComposeMaterial 3ViewBindingCI/CDProGuard/R8Experience with Android modernization and migration projectsWhat We OfferFlexible part-time engagement (agreed according to the project’s needs and the developer’s availability), flexible working hours, remote-first environment, high ownership, and long-term collaboration opportunities.