Location: Full remote (Poland) or hybrid work (office located in Gliwice)Start Date: ASAP / within 1 month Responsibilities: Developing and maintaining Android applications using KotlinBuilding user interfaces based on modern mobile UI/UX principlesWorking with Jetpack components (LiveData, ViewModel, Jetpack Compose, Coroutines) and supporting legacy UI (XML, View-based)Integrating Firebase and other mobile backend servicesManaging source code, CI/CD processes and app distributionImplementing RESTful APIs, networking logic and dependency injectionEnsuring clean, maintainable code and improving user experienceTroubleshooting issues and proactively proposing solutions Requirements: 3+ years of professional experience in Android development using KotlinUnderstanding of mobile UI/UX conceptsA solid understanding of modern Android frameworks including Android Jetpack components such as LiveData, ViewModel, Jetpack Compose UI and Kotlin Coroutines + familiarity with legacy patterns such as XML layouts and classic View-based UIStrong understanding of object-oriented programming (OOP), functional programming and architectural principles and design patternsAbility to write clean, scalable and maintainable codeExperience working in a Scrum/Agile environmentExperience with source control systems (Git), CI/CD pipelines and app distributionExperience with Firebase or other mobile-focused backend services such as Analytics, Crashlytics, Cloud Functions or Remote ConfigExperience with WebViewProficiency in RESTful APIs, JSON parsing and networking in Android as well as experience with dependency injection frameworksA proactive attitude – suggesting ideas, researching solutions and solving problemsCreativity and attention to detail – always looking to improve the user experience and code qualityExcellent problem-solving and analytical skillsFluent in Polish and English is a must (min. B2 level)Experience in video streaming projects is a plus Offer: B2B contract via ExperisMultisport cardPrivate healthcare (Medicover)Access to an e-learning platformGroup life insurance