Edmund Teo enhanced the file upload flow for the LifeSG/web-frontend-engine repository, focusing on improving user experience and reliability during file-based workflows. He implemented frontend logic in React and TypeScript to prevent form submission while files are uploading or processing, introducing robust validation and multi-state status handling, including an INJECTED status. Edmund expanded test coverage to reduce the risk of partial submissions and clarified API expectations by updating Storybook documentation. His work emphasized thorough testing and clear documentation, ensuring both end users and developers benefit from safer, smoother interactions and a more predictable, maintainable file upload process.