Worked on the wazuh/wazuh-indexer repository to enhance search performance and reliability by enabling concurrent_segment_search auto mode as the default setting. This involved backend development using Java and YAML, with a focus on optimizing search paths to reduce latency under concurrent workloads. Adjusted default slice counts and introduced tolerance in matrix_stats aggregation test assertions to minimize flaky tests, ensuring more predictable results. Updated system configurations and test environments to align with the new defaults, improving consistency between production and testing. The work demonstrated attention to both system configuration and testing, resulting in a more robust and maintainable search infrastructure.