Alex Delaveau focused on backend development for the OPEN-ENT-NG/form repository, addressing reliability issues in PDF export functionality for form responses. He resolved a bug that previously caused errors when the statement field contained null values, ensuring smoother PDF generation. Alex refactored the statement formatting logic to enhance code robustness and readability, which contributes to easier maintenance and fewer user-facing export errors. Additionally, he implemented a migration fix related to Vert.x, improving deployment stability. His work primarily utilized Java and PDF generation techniques, demonstrating a methodical approach to code quality and reliability, though the scope was limited to bug fixes this period.