During their work on the keycloak/keycloak repository, Andrzej Szczuczuk focused on improving build and test infrastructure reliability. They stabilized the Maven build by correcting the Theme Verifier Maven Plugin configuration, ensuring proper parent reference resolution and preventing build failures that could disrupt CI pipelines. Andrzej also enhanced test determinism by migrating the curl container image source in the test suite from DockerHub to quay.io, reducing external dependency risks and improving container creation performance. Their contributions leveraged Java, Maven, and containerization skills, addressing targeted configuration and infrastructure issues with a depth of understanding appropriate for robust release readiness and repository health.