Worked on backend stability and data quality improvements for the knime/webapps-common repository, focusing on flow variable handling. Addressed a bug in Java by introducing an asDataRow helper within FlowVariableViewUtil, which converts null string values to missing cells during data row creation. This technical approach improved data representation and reduced unnecessary error messages caused by invalid flow variable configurations, enhancing the reliability of the module. The work emphasized backend development and Java expertise, with careful attention to traceability through explicit commit references and issue linkage. No new features were released, as the primary focus remained on reliability and data integrity.