Worked on enhancing S3 access control within the apache/opendal repository by implementing improvements to the S3 service layer’s permission management. Focused on backend development using Rust, the work introduced a default Access Control List for new S3 objects, ensuring consistent permission settings and reducing the risk of misconfiguration. Additionally, enabled ACL headers for multipart uploads so that permissions are correctly applied to each part, aligning with governance and data protection requirements. Leveraged AWS S3 integration skills to address security concerns and standardize object permissions, contributing a targeted feature that strengthens access control without introducing new bugs during the development period.