Worked on the Brain-up/brn repository to enhance CI/CD pipeline reliability by addressing TLS certificate management and domain cleanup. Focused on improving deployment security and reducing operational overhead, the developer updated TLS handling within GitHub Actions workflows, migrated to a more stable runner environment, and integrated FIREBASE_CONFIG into secrets management. By removing the unused brainup.fun domain from certificate creation and renewal processes, they streamlined certificate management and minimized potential points of failure. Utilizing Shell and YAML, the work demonstrated a practical approach to DevOps, resulting in a more robust, scalable deployment process with fewer certificate-related issues across environments.