April 2025 - Apache Doris (apache/doris): Key features delivered include a focused code refactor to improve maintainability. Extracted StringOP and SubstringUtil into stringop_substring.h with no behavioral changes. Major bugs fixed: none reported for this period. Overall impact: enhanced code organization, reduced coupling in utility components, and a cleaner foundation for future enhancements. Technologies/skills demonstrated: C++ refactoring, headerization, modularization, and commit-driven development.

February 2025 monthly summary: Delivered core data compression capabilities in Doris via COMPRESS and UNCOMPRESS, backed by a ZLIB backend, enabling in-database compression/decompression and frontend registration. Implemented robustness fixes and tests to improve reliability and correctness. Published user-facing documentation for the new SQL functions. Cross-repo collaboration across apache/doris and apache/doris-website to ship both the feature and its docs. Business value includes reduced storage footprint and I/O, enabling scalable analytics and cost efficiency. Demonstrated strong systems programming, testing, and documentation skills across the codebase.