During December 2025, Chema Molins developed the Survey Participant Management feature for the LimeSurvey/LimeSurvey repository, enabling users to add and modify participant properties within the existing participant model. He focused on backend development using PHP, implementing robust API integration to streamline participant data handling and reduce manual processes. Chema also addressed an XML-RPC signature mismatch in the set_participant_* API, restoring reliable synchronization with external systems and improving data integrity. His work enhanced the consistency and reliability of participant data exchange, supporting smoother onboarding and data collection workflows. The depth of his contributions reflects strong backend and API integration skills.