During July 2025, Hettbox focused on backend development for the spring-data-elasticsearch repository, addressing stability and data integrity in Elasticsearch update operations. He identified and resolved a critical datatype mismatch in the UpdateQuery component, changing ifSeqNo and ifPrimaryTerm from Integer to Long to align with Elasticsearch’s expected field types. This adjustment prevented data truncation and reduced update errors, directly improving the reliability of document updates. Working primarily with Java and leveraging his expertise in Elasticsearch, Hettbox’s contributions enhanced the correctness of update paths, resulting in fewer production-time failures and more consistent data handling across the system, despite no new feature additions.