Hieu worked on the LifeSG/react-design-system repository, focusing on Node.js runtime version management to enhance 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 ensuring parity between development and production environments. Using Shell scripting and Node.js, Hieu implemented standardized version management, which reduced environment drift and improved CI/CD onboarding. His work included clear traceability through well-documented commits linked to CCUBE-1770, supporting auditability and code review. The depth of his contribution lay in strengthening runtime stability and streamlining environment configuration for ongoing development workflows.