Joseba Querejeta developed new UI features for Lemoncode’s quickmock and gex-front repositories, focusing on maintainable front-end solutions. He built low-fidelity wireframing line components, integrating them into quickmock’s shape model and rendering system using React, TypeScript, and SVG, while also refactoring code to streamline asset management and default property handling. In gex-front, he enhanced the contract creation workflow by designing a temporality step UI with fields for execution periods and financial details, leveraging Material UI and Formik for robust form management. His work demonstrated strong code organization and cross-repository collaboration, resulting in efficient, maintainable feature delivery within the sprint.