Senior Android Developer

Key Responsibilities Design, develop, modernize, and maintain native Android applications using Kotlin and modern Android development practices. Lead modernization efforts for legacy Android codebases, including migration from Java to Kotlin, XML-based UI to Jetpack Compose, monolithic structures to modular architecture, and outdated libraries to supported alternatives. Own feature delivery from technical design through implementation, testing, release, monitoring, and post-release improvement. Apply clean architecture, SOLID principles, dependency injection, reactive programming, and maintainable modular design patterns. Collaborate closely with product managers, designers, backend developers, QA engineers, DevOps teams, and security stakeholders. Review AI-generated code and agent-produced changes critically, ensuring correctness, maintainability, security, performance, and alignment with project standards. Use AI agents and developer tools to accelerate implementation, refactoring, documentation, test generation, debugging, and modernization workflows without compromising engineering discipline. Improve application performance, startup time, memory usage, responsiveness, battery efficiency, accessibility, and reliability. Write and maintain unit tests, UI tests, integration tests, and automated checks for critical user flows. Mentor mid-level and junior Android developers, support code reviews, and help raise engineering standards across the team. Required Qualifications Minimum 7 years of professional experience in Android application development. Strong hands-on experience with Kotlin and solid understanding of Java for legacy code maintenance and migration. Deep knowledge of Android SDK, Android Studio, Gradle, Jetpack libraries, lifecycle-aware components, ViewModel, Navigation and app compatibility considerations. Practical experience with Jetpack Compose and state-driven UI development; ability to support XML-based legacy screens where needed. Strong understanding of MVVM, MVI, Clean Architecture, modularization, dependency injection frameworks such as Hilt or Dagger, and scalable mobile architecture. Experience with Kotlin Coroutines, Flow, StateFlow, SharedFlow, structured concurrency, cancellation, error handling, and asynchronous programming patterns. Experience integrating RESTful APIs, authentication flows, push notifications, analytics, crash reporting, and third-party SDKs. Strong understanding of secure mobile development practices, including secure storage, token handling, certificate pinning concepts, obfuscation, and protection of sensitive data. Experience with Git-based workflows, pull requests, branching strategies, code reviews, CI/CD pipelines. Ability to troubleshoot production issues using logs, crash reports, performance profiling, and observability tools. Strong communication skills and ability to translate product requirements into robust technical solutions. Preferred Qualifications Experience modernizing enterprise-scale Android applications with large codebases, multi-module structures, or long-lived legacy components. Experience with Kotlin Multiplatform, on-device AI, ML Kit, TensorFlow Lite, or AI-enabled mobile features. Experience using AI-assisted engineering tools such as coding agents, IDE assistants, CLI-based agents, test-generation tools, or automated refactoring assistants. Experience building offline-first applications, background processing workflows, secure enterprise applications, or applications with complex authentication and authorization requirements. Experience with performance optimization, accessibility standards, localization, design systems, and reusable component libraries. Experience working in Agile/Scrum teams and contributing to technical planning, estimation, and engineering roadmap discussions. Location: Bostancı/İstanbul Office work is required one day a week. Shuttle service is not provided. The number of days working from the office may increase depending on business needs