During April 2025, Tiago Vilaverde focused on backend development and security management in the dnhatn/elasticsearch repository, addressing a security issue in Entity Analytics. He implemented a targeted bug fix by adding a dot prefix to the entity analytics system indices within the role descriptor, a change that aligns with best practices for role-based access control in Java environments. This adjustment reduced the risk of unauthorized access to sensitive analytics data and supported compliance requirements. Tiago’s work demonstrated a clear understanding of access control boundaries, delivering a focused solution that improved the security posture of the system without introducing new features.