Worked on the apache/tomcat repository to enhance the stability of the JDBC connection pool by addressing a resource management issue. Implemented a fix in Java to ensure that closed connections are not re-added to the tomcat-jdbc pool, thereby reducing the risk of resource leaks and improving reliability under load. The approach involved adding a check to verify connection status before returning it to the pool, which helps maintain consistent backend performance. Demonstrated skills in Java, JDBC, and connection pooling, with a focus on backend development and code review. The work contributed to more robust connection management in production environments.