Developed a domain-based design configuration system for the is-a-dev/register repository, focusing on scalable management of design elements and point-to-point settings. The work involved reorganizing and migrating JSON configuration files into a domains namespace, introducing domain-scoped variants and integrating DKIM domain key configuration to enhance email authentication. Leveraging skills in configuration management and DKIM configuration, the developer refactored the project’s structure to reduce configuration drift and improve maintainability. This approach enables more reliable deployments and streamlines onboarding of new domains, positioning the system for future scalability while ensuring robust email security through JSON-driven configuration and domain-centric design principles.