Worked on enhancing reliability and performance for query-related functionality in the apache/lucene repository, focusing on strengthening test coverage and optimizing CI feedback loops. Improved test infrastructure by refactoring test cases, standardizing configurations, and reducing flakiness, which led to more predictable release cycles and higher production confidence. In the elastic/docs-content repository, addressed template rendering issues by fixing Mustache template examples to generate valid queries with array data and clarifying documentation. Leveraged Java, unit testing, and performance optimization skills to deliver targeted improvements that reduced maintenance overhead, increased test determinism, and reinforced the robustness of backend systems and developer tooling.