Cem Guder contributed to data engineering and CI/CD initiatives across two Mozilla repositories. For mozilla/bigquery-etl, he addressed data integrity issues in ADM daily aggregates by updating SQL queries, refreshing mock data, and converting block IDs to integers, which improved the reliability of aggregate calculations and strengthened data quality checks. In mozilla/remote-settings, he implemented multi-platform Docker image publishing through CI updates, enabling automated builds and releases for both amd64 and arm64 architectures. His work leveraged SQL, Docker, and YAML, demonstrating a methodical approach to enhancing data reliability and expanding deployment capabilities within a short two-month engagement.