During May 2025, Hieu Nguyen focused on enhancing the LifeSG/react-design-system repository by implementing Node.js runtime version management to improve security and maintain environment consistency. He upgraded the Node.js runtime to 22.15.0 and synchronized the .nvmrc file to 22.13, addressing vulnerabilities and reducing drift between development and production. Using Shell scripting and Node.js, Hieu ensured that both environments operated on standardized versions, which streamlined CI/CD onboarding and reduced potential integration issues. His work demonstrated attention to traceability and auditability through well-documented commits, reflecting a methodical approach to version management and vulnerability remediation within the project’s infrastructure.