Developed foundational Participant Attributes Management for the Solvro/backend-eventownik repository, focusing on backend development and database design using TypeScript and SQL. Introduced a migration-first approach to create participant_attributes and attributes tables, enabling the association of custom attributes with participants and events. This work established a flexible data model by defining attribute metadata such as name, slug, event, options, and type, allowing for richer participant data capture and future event-level customization. The implementation laid the groundwork for attribute-driven workflows, segmentation, and reporting, minimizing runtime impact while supporting scalable analytics and extensibility within the event management system’s backend architecture.