Worked on enhancing the data submission user experience within the feast-dev/feast repository by improving the DataSource and FeatureView modals. Focused on implementing robust error handling and clear submission state indicators, the work aimed to provide users with more transparent feedback during data ingestion workflows and reduce ambiguity in the submission process. Leveraged React and TypeScript to update the front end, ensuring that error messages and loading states were communicated effectively. The changes streamlined the user interface for data submissions, making the process more intuitive and reliable for users interacting with the system through JavaScript-based front end components.