Worked on core infrastructure for the spring-projects/spring-boot and spring-projects/spring-security repositories, focusing on test reliability and build stability. Enhanced DataJpaTest in Spring Boot by enabling nested test classes to inherit properties from outer @DataJpaTest annotations, such as spring.profiles.active, and validated this behavior with integration testing in Java and XML. In spring-security, addressed build configuration by correcting the Shibboleth Maven repository setup to reference only release artifacts, explicitly disabling snapshot builds. These contributions improved CI consistency, reduced flaky tests, and ensured reproducible builds, demonstrating a methodical approach to integration testing, build configuration, and Java development within Spring-based projects.