Job Description:Business OverviewRakuten Group, headquartered in Japan, serves approximately 100 million customers in Japan and over 1 billion globally. We offer more than 70 diverse services across various sectors, including e-commerce, payment services, financial services, communications, media, and sports.　Department OverviewThe Business Support Department within the Commerce &amp; Marketing Company is responsible for a portion of the Rakuten Merchant Server (RMS) – an ASP service provided to merchants on Rakuten Ichiba – as well as various applications that support the business staff who operate Rakuten Ichiba both domestically and internationally.Specifically, our section develops, operates, and provides systems for Rakuten Ichiba merchants, including chat inquiry functionality between merchants and Rakuten, and between merchants and shoppers, AI chatbot functionality for merchants, as well as data analytics systems that visualize data on merchant operations.For this position, we are seeking a engineer for AI Chatbot who will be responsible for the development and implementation of our next-generation AI-powered chat system.Position:Why We HireWith the feature expansion and quality improvement of the AI Chatbot service, we are recruiting a mid-level engineer to strengthen our development team.　Position DetailsAs an AI Chatbot Engineer, you will be responsible for:Development and Implementation- Full-stack development using TypeScript, Node.js, and React- Developing new features and improving existing functionality for AI chat- Implementing frontend UI/UX and developing backend APIs- Creating and executing unit tests and integration testsTechnical Contribution- Participating in code reviews and contributing to quality improvement- Investigating technical issues and proposing solutions- Proposing improvements to development processes- Sharing technical knowledge within the teamParticipation in System Design- Creating detailed design documents and implementation- Implementation considering performance and security- Participating in feature design under the guidance of the Lead EngineerCollaboration and Communication- Effective collaboration with team members- Confirming and coordinating specifications with Product Managers- Reporting technical progress and sharing issuesOperations and Maintenance- Bug fixes and incident response- Supporting production environment monitoring and troubleshooting- Participating in deployment activitiesIdeal Candidate Profile- High motivation for technical growth and proactive in learning new technologies- Values teamwork and demonstrates strong collaboration skills- Strong problem-solving abilities and can act independently- Commitment to code quality- Ability to think about service improvements from a user perspectiveWork EnvironmentThe Client Section is divided into three groups based on roles: DEV/PJM, PDM, and SRE.The PDM and DEV/PJM teams collaborate to develop and operate the services mentioned above.Since our offices are in Tokyo, Osaka, and Sendai, remote communication may be required depending on the service.　Mandatory Qualifications:- Development experience with TypeScript, Node.js, and React (2+ years)- Full-stack development experience (implementation experience in both frontend and backend)- Team development experience (Git, Agile development, etc.)- Web API design and implementation experience　Desired Qualifications:- Development experience with AI-powered systems (especially chatbots and natural language processing)- Implementation experience with microservices architecture- Practical experience with cloud services such as AWS and GCP- Experience building and operating CI/CD pipelines- Practical experience with agile development methodologies (Scrum, etc.)- Large-scale system development and operation experience- Test automation experience　Others Information:Additional information on LocationTokyoAdditional information on English QualificationTOEIC 800 or higher#engineer #applicationsengineer #commerce #RakutenIchibaLanguages:English (Overall - 3 - Advanced)