Rayhannur Rohman focused on privacy and security enhancements in the UKHomeOffice/firearms repository, where he mitigated PII exposure in analytics by implementing custom HTML page titles and dynamic templating. Using JavaScript and HTML, he introduced reusable patterns that prevent sensitive data from being logged by Google Analytics, improving compliance and data quality. He also upgraded dependencies to address security vulnerabilities, strengthening the project’s overall security posture. In the UKHomeOffice/modern-slavery repository, Rayhannur managed dependency updates with NPM and Yarn, aligning the codebase with the latest security advisories and features. His work demonstrated depth in frontend development and dependency management.