During April 2026, this developer completed a security hardening and codebase refactor for the companieshouse/acsp-web repository, focusing on reducing vulnerabilities and improving maintainability. The work involved targeted fixes for the ASM-2082 vulnerability, which were merged through a dedicated pull request. Throughout the process, they ensured that feature delivery was maintained without introducing user-facing regressions, and enhanced the application's testability and CI readiness. Utilizing technologies such as Node.js, Express.js, and Docker, the developer improved the overall code structure and security controls, resulting in a more robust and maintainable web application while preserving existing functionality and development workflows.