Senior Software engineer, Android (Mobile Enablement) - Mercari

本ポジションは日本語JDの用意がありません。 Senior Software engineer, Android (Mobile Enablement) - Mercari Employment Status: Full-time Work Hours: Full Flextime (no core time) Office: Roppongi For more details, see the Overview of Our Positions section on our Careers site. About Mercari Circulate all forms of value to unleash the potential in all people "What can I do to help society thrive with the finite resources we have?" The Mercari marketplace app was born in 2013 out of this thought by our founder Shintaro Yamada as he traveled the world. We believe that by circulating all forms of value, not just physical things and money, we can create opportunities for anyone to realize their dreams and contribute to society and the people around them. Mercari aims to use technology to connect people all over the world and create a world where anyone can unleash their potential. For more information about Mercari Group’s mission, see Mercari’s Culture Doc Organization/Team Mission Mercari Engineering Principles Mercari Engineering Principles are a shared understanding that serves as the foundation of engineering beliefs and behavior at Mercari. The Engineering Principles are designed to complement the organizational identity (Mercari’s mission, values, and culture) from an engineering viewpoint. These principles ultimately help us achieve Mercari’s mission by defining the ideal state we seek to realize in the long term. Passion For The Product Grow Together Solve Through Mechanisms Collaborate Openly For more details, please see the following link: Engineering Culture The Mobile Enablement team transforms mobile development into a seamless, automated, and cross-platform ecosystem. Our mission is to deliver innovative features and user experiences to maximize product-facing impact for Mercari's business. We simplify engineering workflows, reduce repetitive tasks through automation/AI, and enable broader collaboration across teams. By streamlining coding, testing, releases, and operations, we accelerate innovation and scalability, ensuring mobile development keeps pace with Mercari's global growth and business needs. Join us to redefine how we build and deliver the Mercari experience! As a Mobile Enabler mainly focusing on the Android ecosystem, you will own and evolve the entire Android engineering ecosystem at Mercari, from lower-level platform capabilities to higher-level architectural decision-making, providing the best experience for our engineers and Mercari users. Tech Stack Android Development: Kotlin, Jetpack Compose, Kotlin Coroutines & Flow Build & Tooling: Gradle (Develocity), Android Studio API & Data: Protocol Buffers AI Tools: Claude Code, Codex, Cursor CI/CD: GitHub Actions, GKE See here for more information about our mission and values. Work Responsibilities Specific work responsibilities are listed below: Periodically join your fellow product engineers in designing, implementing, and maintain high-quality Android features to understand their reality and define the best solutions for them. 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, and stability across diverse devices and OS versions. Work closely with machine learning, backend, infrastructure, product, and design teams to deliver seamless mobile experiences, as well as other feature-owner Android engineering teams. Take ownership and evolve Mercari's mobile platform, SDKs, and shared modules used across teams. Drive high code quality through code reviews, automated testing, CI/CD improvements, and rigorous documentation. Champion engineering best practices and contribute to guidelines and standards across Client Engineering. Stay current with the latest developments in Android, Kotlin, Android Vie