Node.js Backend Development with TypeScript

progressive_disclosure: entry_point: summary: "TypeScript backend patterns with Express/Fastify, routing, middleware, database integration" when_to_use: - "When building REST APIs with TypeScript" - "When creating Express/Fastify servers" - "When needing server-side TypeScript" - "When building microservices" quick_start: - "npm init -y && npm install -D typescript @types/node tsx" - "npm install express @types/express zod" - "Create tsconfig.json with strict mode" - "npm run dev" token_estimate: entry: 75 full: 4700