During their work on the DS4SD/docling repository, Ceb focused on enhancing the HTML parsing logic to address a specific issue with footer tag handling. They modified the backend parser, written in Python, to interpret the HTML footer tag as a distinct layer within the furniture and content model, ensuring that footer content is no longer misclassified as body text. Ceb supplemented this change with automated tests to validate correct parsing behavior and prevent regressions. Their contributions improved content extraction accuracy, rendering consistency, and indexing reliability, demonstrating solid skills in backend development, HTML parsing, and test-driven development within a collaborative environment.