Over a two-month period, contributed to backend and API development across two repositories, focusing on reliability and localization. In gopidesupavan/airflow, addressed data integrity issues in DAG deletion workflows by restructuring the deletion order of related models and introducing targeted unit tests, using Python and SQL to ensure consistent database state and prevent regressions. Later, in antinomyhq/forge, developed a Markdown rendering feature in Rust that preserves Korean word spacing when wrapping structured output, updating text processing utilities and expanding test coverage. The work emphasized maintainability, localization readiness, and robust testing practices, demonstrating depth in backend engineering and database management.