Learn to design and build production-ready LLM applications that can handle massive datasets of 200M+ text records through this conference talk from DevConf.CZ 2025. Discover the essential architectural principles and scalable design patterns needed to create robust LLM-powered applications that go beyond simple API calls and prompt engineering. Explore when to implement agentic approaches versus simpler solutions, understand how to maintain modularity and adaptability in large-scale systems, and gain practical insights from real-world production deployments. Master the thoughtful design considerations, common-sense strategies, and battle-tested techniques necessary to successfully deploy LLM applications at enterprise scale without falling into common hype-driven pitfalls.