Worked on enhancing the stability and reliability of the square/workflow-kotlin repository by addressing a critical issue in Android UI development. Focused on resolving a NullPointerException that occurred in DialogSession during touch-event handling, the solution involved implementing defensive null checks to ensure the decor view was present before canceling pending input events. This approach prevented crashes during rapid dialog interactions, improving both runtime stability and user experience. Demonstrated expertise in Kotlin and Android development, with careful attention to code hygiene and maintainability. The work contributed to a more robust input-dispatch path and increased testability within the UI layer of the project.