Worked on the is-a-dev/register repository to design and implement a scalable Subdomain Registration Data Model supporting multi-record DNS configurations. Focused on updating the existing schema by introducing a new JSON structure that captures subdomain ownership and allows for multiple DNS records, replacing the previous single-record approach. The migration was managed through clear commit history and careful field naming alignment to ensure future extensibility and seamless client integration. Utilized skills in DNS configuration, data modeling, and domain management, leveraging JSON as the primary language for schema definition. The work emphasized maintainability and adaptability for evolving subdomain registration requirements.