Fernando Arribas Jara contributed to the apache/ranger repository by enhancing the reliability and maintainability of its Elasticsearch audit integration. He addressed resource management issues in the ElasticSearchAuditDestination, implementing robust error handling in Java to ensure safe shutdown of the RestHighLevelClient during initialization and operation failures. This work reduced the risk of resource leaks and improved system resilience when Elasticsearch interactions failed. Later, Fernando upgraded the project’s Elasticsearch dependency from version 7.10.2 to 7.17.29, updating API imports and project configuration to maintain compatibility and performance. His backend development efforts focused on stability, compatibility, and long-term maintainability.