About Company
Mercari is Japan’s largest C2C marketplace, a platform that empowers millions to buy and sell pre-loved items with ease and confidence. Our mission is to “create value in a global marketplace where anyone can buy & sell,” and we are dedicated to transforming the way people interact with products, fostering a more sustainable and circular economy. Since our inception, we have grown into a leading technology company, continuously innovating to provide a seamless, enjoyable, and secure experience for our users across Japan and beyond. We pride ourselves on a vibrant, diverse, and inclusive work environment, where curiosity, ownership, and a user-first mindset are highly valued. At Mercari, you’ll be part of a passionate team that tackles complex challenges, leverages cutting-edge technology, and directly impacts the daily lives of millions. Join us to contribute to a product that truly makes a difference, grow your career in a dynamic international setting, and help us build the future of commerce.
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Job Description
Are you a highly skilled and passionate Mobile Application Developer eager to shape the future of e-commerce? Mercari, Japan’s leading C2C marketplace, is seeking a talented and driven Mobile Application Developer to join our innovative engineering team in Tokyo. In this pivotal role, you will be instrumental in designing, developing, and maintaining our highly-trafficked mobile applications, enhancing the user experience for millions of Mercari users across both iOS and Android platforms. You will work within an agile, cross-functional environment, collaborating closely with product managers, UX/UI designers, and backend engineers to deliver innovative features and robust solutions. This is an exciting opportunity to contribute to a product that directly impacts people’s lives and to further develop your skills in a cutting-edge technological landscape. We value clean, maintainable code, strong architectural principles, and a commitment to continuous improvement and learning. If you thrive on technical challenges, possess a keen eye for detail, and are dedicated to crafting exceptional mobile experiences that delight users, we encourage you to apply. This role offers the chance to work on a large-scale application, optimize performance for a massive user base, and engage with the latest mobile development trends and technologies.
Key Responsibilities
- Design, develop, and maintain high-quality, performant mobile applications for iOS and Android platforms.
- Collaborate with product managers, designers, and other engineers to define, design, and ship new features.
- Write clean, maintainable, and well-documented code following best practices.
- Participate in code reviews to ensure code quality and share knowledge with team members.
- Identify and resolve performance and scalability issues in existing applications.
- Troubleshoot, debug, and upgrade existing software to improve functionality and user experience.
- Stay up-to-date with the latest mobile technology trends, frameworks, and best practices.
- Contribute to the continuous improvement of development processes and tools.
Required Skills
- Proficiency in Swift/Objective-C for iOS development and/or Kotlin/Java for Android development.
- Strong understanding of mobile UI/UX principles, patterns, and best practices.
- Experience with RESTful APIs, third-party libraries, and cloud messaging.
- Solid understanding of the full mobile development lifecycle.
- Familiarity with version control systems, especially Git.
- Ability to write unit and integration tests to ensure code reliability.
- Excellent problem-solving skills and a strong attention to detail.
Preferred Qualifications
- 3+ years of professional experience in mobile application development.
- Experience with cross-platform frameworks like React Native or Flutter.
- Familiarity with CI/CD pipelines for mobile applications.
- Experience with large-scale, high-traffic consumer applications.
- Knowledge of A/B testing methodologies and analytics tools.
- Experience working in an agile development environment.
- Business-level Japanese language skills (oral and written) or a strong willingness to learn.
Perks & Benefits
- Competitive salary and performance-based bonuses.
- Comprehensive health insurance and welfare programs.
- Full transportation allowance.
- Visa and relocation support for international hires.
- Generous paid time off, including special leave benefits.
- Support for continuous learning and professional development (e.g., conferences, courses, books).
- Employee stock options program.
- Free lunches, snacks, and drinks at the office.
- On-site fitness facilities and wellness programs.
- Childcare support and family-friendly policies.
- Diverse and inclusive work environment with language learning support.
How to Apply
Interested candidates are encouraged to click the link below to visit Mercari’s careers page. Please search for ‘Mobile Application Developer’ or ‘Software Engineer, Mobile (iOS/Android)’ and submit your application directly through our portal, ensuring all required fields are completed and your resume highlights your relevant experience.
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