I'm Sreenivas Makam (Sreeni), an engineering and technology leader with more than 20+ years of experience across Google, Cisco, BYJU'S, and startups. My work spans AI, cloud platforms and distributed systems. I also share practical AI and cloud engineering lessons on my blog, Sreeni’s Blog.  I have built engineering teams and platforms serving millions of users. I'm also the author of Mastering CoreOS and a former Docker Captain. Today, I focus on LLM engineering, retrieval-augmented generation (RAG), agentic systems, and the architecture decisions that connect working prototypes to reliable applications.  My teaching approach is practical: explain the core ideas, build working examples, and examine the tradeoffs. I know how overwhelming a fast-changing technology landscape can feel, so my goal is to help you understand why a system works, where it can fail, and how to choose an approach for your own use case.  If you enjoy learning by building and asking questions, I look forward to exploring AI systems with you.