Senior Android Engineer, Sole Proprietor Development Department, Tokyo

**About the company:** Money Forward Minato-ku, Tokyo Money Forward is a fintech startup delivering tools to visualize and improve both individuals'​ and companies'​ financial health. **Responsibilities:** Design, develop, and maintain our Android application to increase the value of Money Forward Cloud for our users, focusing on usability, performance, and reliability. Continuously improve the development process to maximize team performance, including refining workflows, enhancing code review practices, and automating routine tasks. Propose and implement improvement measures based on qualitative and quantitative data, including log analysis, analytics, and user interview results. Select appropriate technologies, architecture designs, and libraries, leading technical discussions and decision-making within the team. Collaborate with web and backend engineers to define and implement API contracts, align business logic, and deliver seamless features across platforms. Lead or contribute to feature implementation, refactoring, dependency updates, bug fixes, and continuous code quality maintenance. Requirements At least 3 years of practical experience as an Android app engineer (5+ years preferred), including involvement in mid- to large-scale applications. Strong knowledge of Kotlin and Kotlin Coroutines, with the ability to write clean, safe, and maintainable asynchronous code. Practical knowledge of Jetpack Compose and experience building UI with modern Android UI frameworks. Development experience using design patterns such as MVVM or similar architectures, with an understanding of separation of concerns. Practical experience reviewing code and providing constructive feedback focused on maintainability and quality. Knowledge of unit testing, UI testing, and testing strategies to ensure reliability in a continuous delivery environment. Practical knowledge developing Web APIs and collaborating with backend engineers, including API contract design. Hands-on experience leveraging AI development tools to assist in engineering tasks such as architecture design, implementation, refactoring, testing, and troubleshooting, while prompting models effectively, evaluating output for security/quality, and maintaining data privacy. Nice to haves While not specifically required, tell us if you have any of the following. Conversational Japanese is a plus Development experience with iOS or web applications to collaborate effectively across platforms. Knowledge of GraphQL and integrating GraphQL-based APIs into mobile applications. Knowledge of Material Design and experience applying design systems for consistent user interfaces. Knowledge of design tools such as Figma to collaborate smoothly with designers. Practical experience in team development using Scrum or other Agile methodologies. Experience in AI development and/or experience in using AI tools to improve development processes. Money Forward is at a major turning point, shifting “from Cloud to AI.” We are currently driving “AX (AI Transformation)”—the next step beyond DX—with the goal of providing “Digital Workers,” where AI agents autonomously execute tasks. As we enter a phase of evolving into Japan’s No. 1 back-office AI company by integrating AI agents into all of our products in the future, we are looking for individuals who can contribute to AI-driven development and value creation. Compensation ¥7,008,000 ~ ¥11,004,000 annually. **Requirements:** At least 3 years of practical experience as an Android app engineer (5+ years preferred), including involvement in mid- to large-scale applications. Strong knowledge of Kotlin and Kotlin Coroutines, with the ability to write clean, safe, and maintainable asynchronous code. Practical knowledge of Jetpack Compose and experience building UI with modern Android UI frameworks. Development experience using design patterns such as MVVM or similar architectures, with an understanding of separation of concerns. Practical experience reviewing code and providing constructive feedback focused on maintainability and quality. Knowledge of unit testing, UI testing, and testing strategies to ensure reliability in a continuous delivery environment. Practical knowledge developing Web APIs and collaborating with backend engineers, including API contract design. Hands-on experience leveraging AI development tools to assist in engineering tasks such as architecture design, implementation, refactoring, testing, and troubleshooting, while prompting models effectively, evaluating output for security/quality, and maintaining data privacy. **Nice to have:** While not specifically required, tell us if you have any of the following. Conversational Japanese is a plus Development experience with iOS or web applications to collaborate effectively across platforms. Knowledge of GraphQL and integrating GraphQL-based APIs into mobile applications. Knowledge of Material Design and experience applying design systems for consistent user interfaces. Knowledge of design tools such as Figma to collaborate smoothly with designers. Practical experience in team development using Scrum or other Agile methodologies. Experience in AI development and/or experience in using AI tools to improve development processes. Money Forward is at a major turning point, shifting “from Cloud to AI.” We are currently driving “AX (AI Transformation)”—the next step beyond DX—with the goal of providing “Digital Workers,” where AI agents autonomously execute tasks. As we enter a phase of evolving into Japan’s No. 1 back-office AI company by integrating AI agents into all of our products in the future, we are looking for individuals who can contribute to AI-driven development and value creation. **Compensation:** ¥7,008,000 ~ ¥11,004,000 annually.