Justas Samuolis developed the op-monitor database module for the nordic-institute/X-Road repository, focusing on centralized schema management for the op-monitor service. He implemented Liquibase-based migrations to automate and standardize database changes, reducing manual intervention and ensuring consistency across deployments. To streamline environment setup, he introduced a Docker image for database initialization, enhancing reproducibility and simplifying DevOps workflows. Justas also updated Red Hat and Ubuntu package specifications to include the new migration scripts, further improving cross-platform provisioning. His work leveraged skills in build automation, database management, and DevOps, utilizing technologies such as Dockerfile, Gradle, and Shell to deliver robust infrastructure improvements.