Abdullozhon Abdullaev focused on backend development for the folio-org/mod-data-export-worker repository, addressing a critical issue affecting data export reliability. He delivered a targeted bug fix in Java, refining the CirculationLogCsvPartitioner to ensure accurate log counts by adjusting the query limit, which now returns the true total number of records. This change prevents unintended data retrieval and supports deterministic exports, directly improving data integrity for downstream analytics and reporting. The solution was validated through unit tests, with clear traceability to the MODEXPW-607 issue, demonstrating careful attention to quality assurance and maintainability within a well-scoped, reviewable code change.