Worked on the Amsterdam/amsterdam-schema repository to deliver a major upgrade to the housing valuation data model, focusing on richer data representation and enhanced compliance. Applied skills in API development, data modeling, and schema design using JSON to introduce detailed attributes for housing objects and valuation points, supporting more robust downstream analytics. Improved data integrity and regulatory compliance by updating authorization flows and refining public and non-public data fields. Adopted consistent CamelCase naming conventions to streamline developer experience and maintainability. The work established a scalable foundation for governance and analytics, with no customer-facing defects reported during the development period.