Discover why rapid AI development without security considerations leads to production disasters in this 20-minute conference talk from AWS re:Inforce 2025. Learn from real-world experience building AI-powered systems for millions of users as the speaker reveals the critical security gaps that generative AI development often overlooks. Explore the transition from quick prototyping to production-ready applications through security-by-design principles, including protective application layers, robust authentication patterns, Infrastructure as Code implementation, and automated CI/CD deployment strategies. Understand how to shift security left in your development process to prevent unauthenticated access incidents, unexpected costs, DDoS attacks, Denial of Wallet events, and complete system failures. Gain practical insights for hardening your AI application stack and transforming fragile rapid development into resilient, scalable architecture that can withstand real-world production challenges.