Developed and delivered a Developer Profiles feature with custom domain registration for the is-a-dev/register repository, enabling users to map personal domains to their profiles through a self-service workflow. The solution introduced a JSON-based Dev record structure, storing both usernames and CNAME fields to facilitate branded developer pages and streamlined onboarding. This backend development effort focused on data management and version-controlled feature delivery, leveraging JSON for data modeling and repository integration. The work established a foundation for future enhancements in self-service registry capabilities, emphasizing maintainable code and extensible architecture while addressing the need for flexible, user-driven domain mapping within the platform.