We build our systems with the hope that they will never fail, but hope is not a strategy. This session is a practical introduction to Chaos Engineering—the discipline of deliberately experimenting on our systems to build confidence in their ability to withstand failure. Based on my hands-on experience building a chaos experimentation platform, I will demystify this powerful practice. We'll explore the core principles of forming a hypothesis and running controlled experiments to proactively discover weaknesses. I will also walk through a prepared offline demo using an open-source tool to show how you can safely simulate real-world failures and build more resilient, trustworthy systems.