In this blog post, CJ Cenizal discusses the Kibana team's process of componentizing their user interface using React, a JavaScript library for building UIs. The team found React's component-based architecture to be a natural fit for their goals, as it allows for encapsulation, making UI code more readable and maintainable while facilitating a faster development cycle. By using React, engineers can focus on integrating event handlers and business logic, rather than worrying about implementation details like CSS and markup. The post also highlights the importance of composition in component development, where React's design supports creating flexible and reusable components that adhere to the single responsibility principle. The team uses tools like AirBnB's Enzyme and Facebook's Jest for unit testing, ensuring that components are reliable and consistent. The article concludes by inviting readers to follow their transition to React through GitHub and participate in an open-source React Design Workshop, with a teaser about applying componentization to the design process in the next installment.