Periodically collaborate with product engineers to design, implement, and maintain high-quality Android features; understand requirements and define optimal solutions.
Own end-to-end development for platform and architectural solutions, from requirements definition through architecture, implementation, testing, and release.
Lead architectural design for complex features and system components, ensuring maintainability, scalability, and reliability.
Optimize app performance (startup time, memory usage, stability) across diverse devices and OS versions.
Work closely with machine learning, backend, infrastructure, product, and design teams to deliver seamless mobile experiences; coordinate with other Android engineering teams.
Take ownership and evolve Mercari’s mobile platform, SDKs, and shared modules used across teams.
Drive code quality via reviews, automated testing, CI/CD improvements, and thorough documentation; champion engineering best practices.
Stay current with Android, Kotlin, Jetpack Compose, coroutines, and mobile architecture patterns; contribute to engineering guidelines.
Propose ideas to improve user experience, developer experience, and operational efficiency; lead cross-team initiatives and mentor junior/mid engineers.
技術スタック
必須スキル
Kotlin and Android development frameworks (Jetpack libraries, Jetpack Compose, Android SDK)
Solid understanding of mobile architecture patterns (MVC, MVVM, MVI, Clean Architecture, etc.)
Experience with large-scale mobile applications and complex codebases
Experience integrating with backend APIs and asynchronous/concurrent programming
Strong analytical/problem-solving skills; ability to navigate ambiguity; excellent communication
Bachelor's degree in Computer Science, Engineering, or equivalent
English: Independent (CEFR B2) Required
歓迎スキル（該当する場合）
Experience with large-scale apps serving millions of users
Expertise in performance optimization, instrumentation, and mobile observability
Experience with modern Android platform capabilities (Kotlin Multiplatform, Baseline Profiles, performance tooling)
Contributions to open-source Android projects or active involvement in mobile community
Experience driving technical initiatives across multiple teams or owning platform-level components
Familiarity with mobile CI/CD, automated testing frameworks, Gradle, and release management