Worked on the qor5/x repository to enhance S3 presigned URL generation, focusing on streamlining backend processes and improving the download experience. The approach involved refactoring the GetURL function to access the S3Endpoint directly from configuration, which reduced unnecessary runtime checks and simplified endpoint resolution. Additionally, Content-Disposition headers were added to presigned URLs, ensuring that downloaded files have stable, user-friendly filenames. These changes improved both performance and maintainability by centralizing configuration usage and increasing the reliability of download links. The work was implemented using Go and leveraged AWS S3 integration skills to address practical backend development challenges.