Developed a scalable user domain configuration and DNS records management feature for the is-a-dev/register repository, focusing on backend development and data modeling. The work involved designing an API-driven system that allows users to specify domain ownership and manage multiple DNS records efficiently. To support this, the data model was refactored by renaming the 'record' field to 'records', enabling future extensibility and improved scalability for DNS configurations. All changes were implemented using JSON for data representation and API integration, with careful attention to code traceability through detailed commit history. No bugs were reported or fixed during this development period.