Jiri Dostal focused on security hardening and maintenance across RedHatInsights repositories, addressing vulnerabilities through targeted dependency management. In vuln4shift-frontend, he upgraded the @patternfly/react-icons package to mitigate Snyk-reported issues, ensuring frontend stability and UI consistency while aligning with security advisories. For registration-assistant, he patched Axios dependencies in both package.json and package-lock.json, reducing risk and improving vulnerability scan results without introducing breaking changes. His work relied on JavaScript, TypeScript, and JSON, emphasizing proactive security patching and compatibility with existing CI processes. Over two months, Jiri demonstrated depth in infrastructure-level improvements, prioritizing maintainability and secure development practices over feature delivery.