Pauline Eustachy focused on enhancing observability and code quality in the OpenCTI-Platform/client-python repository by addressing a logging issue related to timestamp accuracy. She replaced the deprecated use of datetime.utcnow() with datetime.now(tz=timezone.utc) in the logger’s formatter, ensuring all log entries are timezone-aware and conform to the ISO 8601 standard. This change improved the reliability and traceability of logs across distributed services, reducing ambiguity from naive datetime objects. Pauline applied her expertise in Python and logging, demonstrating a strong understanding of datetime and timezone handling. Her work addressed a subtle but impactful bug, contributing to robust system monitoring.