Martynas worked on modernizing the Docker image for the apache/jena repository, focusing on enhancing deployment flexibility and security. He upgraded the image baseline from Java 17 to Java 21 using eclipse-temurin:21-alpine, enabling multi-platform builds and reducing platform-specific build failures. By updating the Alpine base image to version 3.21.2, Martynas ensured the inclusion of recent security patches and a current package ecosystem. His work leveraged containerization and DevOps skills, primarily using Dockerfile, to improve both portability and security posture. The depth of the changes addressed cross-platform compatibility and vulnerability remediation, supporting broader and more secure deployments.