Worked on the confirmation-statement-api repository to deliver a dedicated SIC codes mapper, focusing on robust data mapping and transformation. Leveraging Java and Spring, the solution enabled seamless JSON to DAO conversions and introduced utilities for transforming lists of SIC codes. The mapper also enriched the DAO by determining section status based on the presence of codes, supporting more accurate data representation. The project standardized Spring as the default component model and consolidated dependency management within the pom file. All changes were implemented incrementally across three commits, ensuring traceability and reliability, with unit testing used to validate the new feature’s functionality.