Worked on the spring-projects/spring-boot repository to address configuration reliability by delivering a targeted fix for configuration import ordering and profile precedence. Focused on stabilizing application startup across environments, the work ensured that environment and system properties are applied in a deterministic order, reducing the risk of misconfiguration. By enforcing that profile-specific imports take precedence over general imports, deployment predictability and consistency were improved. The solution involved enhancements to the ConfigDataEnvironment component, utilizing Java and the Spring Framework, and was validated through unit testing. This contribution resolved a critical bug, directly linking the change to an existing GitHub issue and commit.