The technical decisions that go into the development of an application for the web are broad and complex. When all of the underlying APIs for that app will also be exposed to developers in the form of APIs, additional levels of complexity are introduced and the fundamental process for making engineering decisions changes. In this session, I’ll share lessons learned from building Courier, an API-first product for notifications. Topics covered will include: - starting at the whiteboard - writing docs before code - choosing the right level of abstraction