As software systems grow in complexity, engineering organizations are increasingly adopting platform engineering as a means to scale delivery, reduce cognitive load, and empower developers. But what does it take to architect a successful Internal Developer Platform (IDP)? This roundtable brings together engineering leaders to discuss key patterns, anti-patterns, and lessons learned in building and evolving platforms that balance standardization with developer autonomy. Topics will include the core components of modern platforms, the role of platform teams, how to measure success, and strategies for driving adoption across diverse teams and tech stacks. Whether you're just beginning your platform journey or looking to mature an existing initiative, join us for a practical conversation on what works