RSR Co., Ltd., a VALTES Holdings group company engaged in web application development, AI-driven development, and software testing, announced that the number of employees completing Meta Platforms-certified React-related online courses has increased. As of May 15, 2026, the company has 13 completers of the React Basics course and 11 completers of the Advanced React course. RSR has been promoting participation in and completion of React-related courses to improve technical capabilities and develop talent in the front-end area of web application development. With the increase in course completers, the company will strengthen its modern front-end development structure using React, Next.js, TypeScript, and related technologies, supporting component design, implementations that consider maintainability and extensibility, and web application development planned with post-release feature additions and improvements in mind. As of May 15, 2026, the React Basics course had 9 previous completers and 4 new completers, for a total of 13. The Advanced React course had 7 previous completers and 4 new completers, for a total of 11. In this release, React-related courses refer to online courses certified by Meta and provided by Coursera. In recent years, web application development has required both improved user experience and faster service improvement, while the importance of development structures capable of handling continuous specification changes and maintenance operations has grown. RSR supports modern front-end development using React, Next.js, TypeScript, and related technologies, providing development support covering screen design, implementation, review, and testing. React is a JavaScript library for efficiently building screens for web applications. Because screens can be developed as individual components, React makes it easier to respond to feature additions and specification changes while improving maintainability and reusability. In recent years, in development usi