Over a two-month period, this developer focused on enhancing CI/CD security for Telefonica’s mistica-design and webview-bridge repositories. They overhauled GitHub Actions workflows, introducing restricted token usage and improving credential handling to reduce exposure risks. Their work included updating token permissions, implementing dedicated tokens for specific steps, and strengthening input validation to prevent code injection in YAML-based pipelines. By aligning documentation and naming conventions with security best practices, they improved maintainability and clarity. The developer leveraged skills in DevOps, GitHub Actions, and continuous integration to deliver features that strengthened automated deployment security without impacting product functionality or reliability.