Worked on strengthening the system settings encryption path in the metersphere/metersphere repository, focusing on backend development and encryption using Java. Addressed a critical bug by ensuring that decryption logic gracefully handles null values for sensitive parameters such as mail passwords, thereby preventing null pointer exceptions. Improved the robustness of the settings module by removing unnecessary toString() calls, which enhanced null-safety and reduced the risk of outages in configuration-sensitive workflows. The work emphasized reliability and maintainability in system settings, leveraging expertise in Java and backend systems to deliver a targeted fix that supports more stable and secure application operations.