Worked on the open-telemetry/opentelemetry-collector-contrib repository to address a critical reliability issue affecting metrics exports. Focused on backend development using Go, the work involved fixing a bug where client-side exponential histograms were emitted with zero timestamps, leading to data rejection by Grafana Cloud Mimir. The solution implemented the nowWithOffset method to ensure all exported histograms carry valid, non-zero timestamps, aligning client and server metrics. Enhanced test coverage was added to validate timestamp correctness and prevent future regressions. This effort improved data integrity and reduced backend errors for users relying on Grafana Cloud and similar observability platforms for monitoring.