Senior Mobile App Developer (Android)

Location: Poland Why Join Exadel We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks. From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next. What powers it all? Our people are ambitious, collaborative, and constantly evolving. About the Client An international transportation technology company focused on building scalable digital solutions for modern rail operations. The organization develops internal platforms and automation tools that improve operational efficiency, support business growth, and streamline complex processes in a fast-paced environment. Tech Stack Kotlin, Native Android Development, Jetpack Compose, Coroutines, MVVM, Clean Architecture, Kotlin Multiplatform (KMP), GraphQL, REST APIs, Firebase Remote Config, Crashlytics, Dagger/Hilt, Espresso, Robolectric, JUnit, GitLab CI/CD, Fastlane What You’ll Do Design, develop, and maintain high-quality native Android applications Contribute to the architectural foundations of a major transformation of client-facing mobile applications Design and implement scalable, maintainable, and testable mobile solutions Drive technical improvements and contribute to architecture decisions Collaborate closely with iOS, Backend, and cross-functional teams Explore and contribute to Kotlin Multiplatform initiatives Optimize application performance, scalability, and user experience Ensure high engineering quality through testing and code reviews Mentor and support other engineers within the team Contribute to technical documentation and development best practices What You Bring Strong senior-level expertise in native Android development and Kotlin Experience with modern Android development, including Jetpack Compose and Coroutines Strong understanding of clean, scalable, and testable mobile architecture principles Experience contributing to mobile architecture design and improvements; previous involvement in architectural decisions or initiatives is a strong plus Experience with unit, integration, and UI testing Openness and willingness to work with Kotlin Multiplatform (KMP) Interest in backend technologies and understanding how mobile applications interact with backend service Strong communication and collaboration skills Experience working in Agile environments Nice to have Hands-on experience with Kotlin Multiplatform (KMP) Previous involvement in mobile architecture design or transformation projects Experience with GraphQL or REST API integrations Knowledge of Firebase tools and mobile analytics Understanding of UI/UX principles and mobile accessibility English Level Upper-intermediate Legal & Hiring Information Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more. Reasonable accommodations are available to enable individuals with disabilities to perform essential functions. Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs. Compensation details are shared with candidates at the early stage of the recruitment process. The offer is not binding until a signed contract is in place. Your Benefits at Exadel Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details. International projects In-office, hybrid, or remote flexibility Medical healthcare Recognition program Ongoing learning & reimbursement Well-being program Team events & local benefits Sports compensation Referral bonuses Top-tier equipment provision Exadel Culture We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.