Worked on stabilizing the tracing subsystem in the major/traefik repository, focusing on backend development and observability using Go. Addressed a critical issue by fixing a panic during TracerProvider initialization within the Span structure, which previously impacted runtime reliability. Enhanced the robustness of distributed tracing by introducing targeted regression tests, including a new TestTracerProvider to verify correct TracerProvider usage. This approach improved code quality and reduced the risk of future regressions in production environments. The work emphasized careful debugging, comprehensive test coverage, and a methodical approach to maintaining stability in complex tracing systems for backend services.