Worked on the ClickHouse/yet-another-cloudwatch-exporter repository, focusing on enhancing the reliability of Prometheus metric exports by addressing a specific edge case in metric name sanitization. Delivered a targeted bug fix in Go that updated the sanitize function within prometheus.go to properly handle parentheses, ensuring that metric names generated for Prometheus no longer include invalid characters. This change improved the accuracy of exported metrics and reduced alert noise for downstream dashboards and monitoring systems. Demonstrated skills in cloud monitoring, Go, and Prometheus, with careful attention to production code quality and robust handling of string sanitization for cloud observability workflows.