Eton Chen enhanced the reliability and security of the Linkry feature in the acm-uiuc/core repository by expanding the automated test suite and addressing an API route vulnerability related to unauthorized access. Using JavaScript and TypeScript for backend development, Eton improved error messaging to provide clearer diagnostics and facilitate faster debugging. The work focused on strengthening access controls and reducing production risk, leveraging AWS DynamoDB and Node.js to ensure robust data handling. By increasing test coverage and refining error handling, Eton enabled safer releases and more efficient issue detection, demonstrating a methodical approach to backend reliability and system observability.