Contributed to the open-telemetry/opentelemetry-collector-contrib repository by addressing a bug in the Prometheus exporter path, focusing on improving label quality during OTLP metric export. Implemented logic in Go to skip empty string attribute values when converting OTLP metrics to Prometheus labels, which prevents the creation of empty job and instance labels and reduces unnecessary label noise on dashboards. Enhanced reliability by adding targeted unit tests to validate the exclusion of empty attributes in label generation. This backend development work resulted in cleaner Prometheus label surfaces, improved dashboard accuracy, and mitigated edge-case label proliferation, demonstrating strong skills in Go and testing.