During December 2025, Gustavo worked on the IQSS/dataverse repository, focusing on targeted improvements to data presentation and governance. He enhanced dataset field ordering by implementing display-order-based sorting for compound fields using Java and ORM techniques, which improved dataset organization and retrieval. Gustavo also updated API paths for permissions history, refining how role assignment history is accessed for both Dataverses and Datasets, thereby strengthening audit trails and permission management. Additionally, he resolved a bug affecting file permissions history retrieval, ensuring accurate audit information. His work demonstrated depth in API development and backend engineering, addressing both feature enhancements and reliability issues.