A large-scale consumer mobile application with millions of active users required a robust testing strategy to ensure stability, performance, and seamless user experience. Testing efforts focused on both iOS and Android platforms, covering functional validation, UI/UX consistency, geolocation features, and real-time interactions.ResponsibilitiesContribute as a key member of a world-class Android Engineering and QA Automation team.Design, implement, and maintain automated test cases and frameworks in Kotlin, JUnit, Espresso.Own the quality lifecycle: identify issues, file and track bugs in TestRail (or similar systems), and drive them to resolution.Collaborate closely with Android engineers to ensure application code is testable and automation-friendly.Build and maintain in-house tools for test parallelization, network mocking, and custom reporting.Perform peer code reviews, ensuring robust test coverage and reliable CI pipelines.Drive improvements to the CI/CD ecosystem, ensuring scalability, maintainability, and speed of test execution.Explore and integrate AI-assisted development approaches to enhance test generation, workflow optimization, and CI/CD practices.Actively participate in Agile ceremonies – daily standups, sprint planning, retrospectives, and showcases.Skills Required4+ years of experience as an SDET, QA Automation Engineer, or related role, with a strong focus on Android application testing.Proficient in Kotlin and the Android SDK, with strong debugging and troubleshooting skills.Hands-on experience with JUnit, Espresso and UI automation.Experience with dependency injection frameworks (Dagger/Hilt) and API testing using Retrofit.Familiarity with Jetpack libraries and modern Android development best practices.Strong experience with Git/GitHub, familiar with both Gitflow and trunk-based development.Knowledge of SOLID principles and ability to apply them in test framework design.Ability to apply or readiness to adopt AI-driven testing practices, including test generation and workflow automation.Strong English communication skills

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SDET for Android (Kotlin) Warsaw