In June 2025, Christos Charmatzis focused on enhancing the GeoParquet DataStore within the geotools/geotools repository by addressing a nuanced bug related to Hive partitioning and query parameters in URIs. He implemented targeted Java code changes to ensure that query parameters are preserved when constructing partition URIs and accurately extracted during partition path parsing. This adjustment improved the reliability of partitioned datasets, particularly in scenarios involving complex query strings, and reduced edge-case failures in data discovery and query routing. Christos applied his expertise in Java development, cloud storage, and data engineering, delivering robust improvements without introducing breaking API changes.