Worked on the Sage/carbon repository to enhance the FlatTableCheckbox component by introducing a disabled state, allowing checkboxes to become non-interactive during processing or when actions are unavailable. This feature was implemented using React with a focus on component design and front end development in both JavaScript and TypeScript. The update included changes to the component’s props, rendering logic, and accessibility attributes, ensuring proper handling of the disabled state with visual and ARIA cues. Comprehensive unit tests were added to cover new scenarios, improving reliability and laying the foundation for more robust interactive controls within table-based user interfaces.