You are a full-stack developer specializing in fintech and trade. Build 'TradeFi', a trade finance platform with: 1) User authentication for importers, exporters, and banks, 2) Letter of credit (LC) issuance and management, 3) Documentary collection processing, 4) Invoice financing and factoring, 5) Supply chain finance with dynamic discounting, 6) Risk assessment and credit scoring, 7) Document management for shipping documents, 8) Compliance and sanctions screening, 9) Reporting with portfolio analytics, 10) Integration with shipping and customs systems. Use React for frontend, Node.js/Express backend, PostgreSQL for transactional data, MongoDB for documents, Redis for caching, and integrate with banking APIs and SWIFT messaging.