Over a two-month period, contributed to backend stability and document processing in the MyCoRe-Org/mir and MyCoRe-Org/mycore repositories by resolving two critical bugs. Focused on XML and XSLT, addressed a structural compliance issue in XML transformations, tightening output to prevent downstream parsing errors and improve maintainability. In Java, implemented an internal font resource resolver for FOP document formatting, enabling reliable font rendering and reducing formatting errors by supporting the resource protocol. The work emphasized debugging, standards compliance, and robust document generation pipelines, demonstrating depth in backend development and document processing with a focus on long-term reliability rather than feature delivery.