Agentic AI is everywhere, but most implementations do not survive beyond prototypes. Building agents that handle real-world complexity requires strong architecture, not just orchestration. In this session, Nensi Hakobjanyan explains how to design and operate production-ready single- and multi-agent systems. She applies monolith-to-microservices principles and domain-driven design to help avoid common pitfalls such as context sprawl, tight coupling, and brittle workflows. The session explores practical architectural patterns for building secure, scalable, and resilient agentic workloads and demonstrates how to move from experimental demos to autonomous systems that run reliably in production.