Worked on the apache/shiro repository to deliver a Jakarta namespace and Java 17 compatibility update, addressing integration test failures and aligning the project with modern enterprise frameworks. The work involved updating dependencies to Guice 7.0.0, Spring 6.1.17, and Spring Boot 3.0.13, ensuring smooth upgrades for teams targeting Jakarta EE and Java 17. Focus was placed on improving compilation and stabilizing the integration test harness, with remaining test issues isolated from core logic. Using Java and integration testing skills, the changes reduced upgrade risk and prepared the codebase for broader adoption within evolving enterprise Java ecosystems.