Senior Android EngineerJoin us, and build secure, high-performance mobile applications daily!Kraków - based opportunity with hybrid work model (2 days/week in the office).Role requires the conversion to client's organization after 6 monthsAs a Senior Android Engineer, you will be working for our client, a global financial services leader driving digital transformation at scale. The client is modernizing its mobile platforms to deliver secure, intuitive, and high-performance digital experiences to millions of users. You will play a key role in building and evolving Android applications as part of a collaborative Agile team. This role combines deep technical expertise with leadership and architecture responsibilities to shape the next generation of secure, scalable, and user-friendly mobile solutions.Your main responsibilities: Designing and developing scalable Android applications using Java and Kotlin Collaborating with product managers, UX/UI designers, and backend developers Integrating RESTful APIs and managing local data with Room or SQLite Implementing clean architecture patterns and Android Jetpack components Leading code reviews and mentoring other Android developers Applying dependency injection frameworks like Dagger or Hilt Writing and maintaining unit tests and UI automation tests Optimizing app performance, memory usage, and responsiveness Managing continuous integration pipelines and version control Ensuring Android apps meet security, accessibility, and design standards You're ideal for this role if you have: Proven experience in a senior or technical leadership role in Android development Expert-level knowledge of Android SDK, Jetpack libraries, and app architecture Proficiency in Java and Kotlin programming languages Strong experience with Android Studio and related development tools Hands-on experience with reactive programming using RxJava or Kotlin Coroutines Expertise in developing scalable, maintainable Android applications Solid understanding of REST APIs, JSON, and asynchronous networking Proficiency in local data storage using Room or SQLite Strong knowledge of Android UI design, Material Design, and custom views Degree in Computer Science and 7+ years of engineering experience It is a strong plus if you have: Experience with Firebase Cloud Messaging and push notification implementation Familiarity with Android NDK and native code integration Understanding of Android's permissions model and runtime permission handling Experience with background processing and concurrency in Android Knowledge of Android accessibility features and inclusive design We offer you:ITDS Business Consultants is involved in many various, innovative and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious and driven people. The offer includes: Stable and long-term cooperation with very good conditions Enhance your skills and develop your expertise in the financial industry Work on the most strategic projects available in the market Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years Participation in Social Events, training, and work in an international environment Access to an attractive Medical Package Access to Multisport Program #GETREADYInternal job ID #7348You can report violations in accordance with ITDS’s Whistleblower Procedure available here.