Vivenda is a full-stack real estate marketplace developed using ASP.NET Core 8 MVC, C# 12, EF Core, and SQLite. The platform includes property search and listings, favorites, inquiries, visit scheduling, and role-based dashboards for Admin, Agent, and User. I built a clean N-tier architecture (Web/BLL/DAL) with Repository, Unit of Work, and Service patterns, and integrated AI chatbot and property assistant features via OpenAI API.