During May 2025, this developer enhanced the SDA-SE/sda-dropwizard-commons repository by upgrading the default MongoDB version used in unit tests from 4.4 to 6.0 within the sda-commons-server-mongo-testing module. They introduced new Java-based test classes to validate compatibility with MongoDB 6.0 and 7.0, expanding the test matrix to catch version-specific issues early. Focusing on backend development and testing, their work improved cross-version reliability and reduced production upgrade risks. By broadening test coverage and managing MongoDB version transitions, they contributed to smoother release cycles and more robust future upgrades, demonstrating strong skills in Java and backend testing.