Lejia Chen focused on backend development in Java during a one-month period, addressing a targeted issue in the JetBrains/intellij-community repository. They identified and resolved a bug affecting JCEF proxy handling by correcting the Proxy PAC URL, specifically removing an incorrect port to ensure accurate proxy configuration. This fix improved the reliability of JCEF-based workflows, particularly in continuous integration and testing environments where proxy misconfigurations could disrupt development. Lejia validated and committed the patch, demonstrating attention to detail and a methodical approach to problem-solving. Their work contributed to a smoother developer experience and enhanced stability for users relying on JCEF proxies.