Worked on enhancing observability querying in the nobl9/nobl9-go repository by implementing millisecond-precision timestamps for OpenTelemetry span queries in Elasticsearch. This feature introduced support for both standard and millisecond-based BeginTime and EndTime placeholders, with added validation to enforce exclusive use of one format per query, ensuring consistent semantics and alignment with Jaeger’s timestamp precision. The approach improved the accuracy and flexibility of span filtering, enabling faster issue diagnosis for backend systems. Leveraged Go and JavaScript for API and backend development, with a focus on robust data validation to maintain query integrity and support advanced monitoring use cases in production environments.