This document discusses how to build and scale a technology company. It describes the different stages of a fast-growing startup, from the early stage focused on speed and product-market fit, to the scale stage requiring quality and exponential growth, to the late stage focused on business continuity and agility. It also discusses the key components of scalability, including the product/software, team, and infrastructure. The role of the CTO changes across these stages from technical lead to people manager to strategy and vision setter.