Worked on the Amsterdam/amsterdam-schema repository to deliver two schema enhancements focused on improving data modeling for operational analytics. Developed and integrated a new attribute to support precise sequencing within fractions, enabling more granular ordering and analysis of grouped data. Designed and implemented a dedicated table for capturing fill speed metrics of household waste clusters, supporting capacity planning and monitoring needs. All changes were made using SQL and JSON, with careful attention to forward compatibility and clear commit traceability. Demonstrated skills in database design, schema development, and schema management, ensuring that new features integrated smoothly with existing data consumers.