This document discusses lessons learned from building two serverless applications: Commercial Search and Property Tour Pro. It summarizes the architectures of each application and the technologies used, including Netlify, Prerender.io, Algolia, Firebase, Cloudinary, DocRaptor, and Auth0. It also discusses why AWS Serverless was not used and provides an overview of the security approaches taken for each application component. The document advocates for a 10X product development approach focused on business needs, frequent iterations, and minimizing dependencies.