Stefanie Zabel contributed to the IsyFact/isyfact-standards and IsyFact/isy-datetime repositories, focusing on process optimization and code maintainability. She improved the release workflow by adjusting Dependabot’s automatic dependency updates from daily to weekly on the release/4.x branch, reducing disruptions and aligning updates with release planning. This change, implemented using YAML and configuration management skills, enhanced CI/CD reliability. In IsyFact/isy-datetime, Stefanie addressed translation and grammar issues in Zeitraum class test comments, improving readability and maintainability without altering test behavior. Her work demonstrated attention to process efficiency and code quality, leveraging Java, YAML, and unit testing expertise.