Berkay Keskin developed a feature-rich leaderboard for the bounswe/bounswe2025group3 repository, focusing on eco-points ranking to enhance user engagement and provide transparent reward metrics. He implemented backend support using Django and Python, creating a dedicated REST API endpoint and a serializer to retrieve and display users ranked by their total_score. The ranking logic was carefully aligned to eco-points, ensuring consistent behavior across different views. Berkay also addressed code hygiene by removing unused imports, contributing to a maintainable codebase. His work demonstrated depth in backend and API development, aligning technical solutions with product goals of gamification and data-driven insights.