The document discusses designing scalable platforms for artificial intelligence (AI) and machine learning (ML). It outlines several challenges in developing AI applications, including technical debts, unpredictability, different data and compute needs compared to traditional software. It then reviews existing commercial AI platforms and common components of AI platforms, including data access, ML workflows, computing infrastructure, model management, and APIs. The rest of the document focuses on eBay's Krylov project as an example AI platform, outlining its architecture, challenges of deploying platforms at scale, and needed skill sets on the platform team.