Comprehensive guide to preventing OWASP Top 10 vulnerabilities with code examples.

• Covers all 10 categories with prevention patterns: access control, cryptography, injection, design flaws, misconfiguration, vulnerable dependencies, authentication, data integrity, logging, and SSRF
• Includes production-ready TypeScript/Node.js code examples for each vulnerability type, from parameterized queries to secure password hashing and JWT token management
• Provides practical implementations for rate limiting, input validation with Zod, secure headers via Helmet, and multi-factor authentication setup
• Features a pre-deployment security checklist covering authentication, authorization, input validation, infrastructure hardening, and monitoring requirements