Platform Engineering: Building and Operating Internal Developer Platforms is a practical guide for anyone involved in creating, evolving, or running a modern software platform within an organization. Internal Developer Platforms (IDPs) are transforming how software is built, deployed, and maintained. They empower development teams to move faster, reduce operational friction, and focus on delivering value while maintaining governance, security, and reliability. This book offers a comprehensive look at the principles, practices, and organizational strategies that make these platforms successful. From understanding developer experience challenges to designing cloud-native foundations, managing accounts and permissions, and creating self-service CI/CD and deployment environments, this book provides actionable insights drawn from years of hands-on experience. It also explores platform adoption, team operating models, automation, and the continuous evolution of platforms in response to real