SkillXchange Platform ER diagram models a peer-to-peer skill marketplace with user profiles, skill inventories, learning requests, and real-time matching. The schema connects Users to Skills via UserSkill junction tables, tracks skill verification and embeddings for semantic search, and manages learning matches with quiz assessments and messaging. This architecture demonstrates how to design a two-sided marketplace with trust mechanisms (verification, ratings), async communication (Ably real-time), and AI-powered skill discovery (NLP embeddings). Fork this diagram to customize for your skill-exchange, mentorship, or talent-sharing platform, then export as .drawio or .svg for documentation. The design separates concerns across user management, skill taxonomy, matching logic, and communication layers—ideal for startups scaling peer-to-peer learning networks.