Giedrius worked on the open-telemetry/opentelemetry-go repository, where he implemented native exponential histogram support for the Prometheus exporter using Go. His work involved designing new histogram metric types, updating the data collection pipeline to emit metrics in Prometheus-compatible formats, and introducing unit tests to ensure correctness and regression safety. By focusing on metrics and observability, Giedrius enhanced the exporter’s ability to provide precise performance data, supporting improved analysis and capacity planning. The depth of his contribution is reflected in the integration of new metric types and robust testing, demonstrating a strong grasp of Go development and observability tooling.