During December 2025, xxuuu0 refactored the apache/opendal repository to enhance service modularity by splitting the FTP and sled services into independent Rust crates. This architectural change leveraged modular programming and dependency management to enable isolated development, targeted deployments, and simplified maintenance for each service. By reducing cross-service coupling, the work allowed for independent release cycles and easier testing, directly addressing maintainability challenges. The FTP refactor also included code formatting improvements using cargo fmt, ensuring consistency and code quality. This focused, in-depth engineering effort demonstrated a strong grasp of Rust, software architecture, and modular design principles within a production codebase.