Developed a declarative DNS provisioning system for subdomains in the is-a-dev/register repository, enabling automated onboarding of new subdomains through JSON-based configuration. The approach allowed explicit specification of subdomain ownership and A records, streamlining DNS resolution and reducing the need for manual intervention. Leveraging skills in DNS configuration, domain management, and JSON, the work established a scalable pattern for future subdomain additions without requiring code changes. The implementation maintained high continuous integration quality and ensured clear Git history traceability. No critical bugs were reported during the period, reflecting a careful and methodical engineering process focused on reliability and maintainability.