Worked on the insightsengineering/teal repository to enhance the reliability of bookmarking features within the Shiny framework using R. Focused on developing and committing comprehensive tests for the module_bookmark_manager, the work covered scenarios such as option retrieval and checks for module bookmarkability. This approach strengthened the test suite, supporting robust behavior and reducing production risk ahead of release cycles. Emphasized test-driven development practices to ensure code quality and maintainability, contributing to smoother CI/CD workflows. The contributions centered on R programming, Shiny application development, and systematic testing, delivering business value by improving the stability and reliability of key application features.