Piotr Kubowicz contributed to build automation and dependency management in two major open-source repositories over a two-month period. In the spring-projects/spring-ai repository, he stabilized build and runtime dependencies by consolidating and correcting module configurations, migrating to swagger-annotations-jakarta, and refining optional dependencies to reduce classpath conflicts. For gradle/gradle, he enhanced Kotlin project templates by updating the default .gitignore to exclude temporary Kotlin Gradle Plugin files, improving repository hygiene for new projects. His work demonstrated proficiency with Java, Groovy, Maven, and Gradle, focusing on practical improvements that streamline project setup and maintain compatibility across evolving Java and Spring ecosystems.