Sebastien Nicot upgraded the OpenTelemetry SDK to version 1.40.0 in the opendatahub-io/kserve repository, focusing on enhancing observability through improved tracing and metrics. Working in Go, he addressed known issues in previous SDK versions by carefully managing dependencies and ensuring release hygiene. His disciplined approach reinforced maintainability and traceability across the codebase, supporting faster incident diagnosis and more reliable service monitoring. By aligning the telemetry stack with current standards, Sebastien enabled smoother integration of monitoring tools and contributed to the overall stability of backend services. His work demonstrated depth in backend development, dependency management, and Go programming.