Building Mobile Apps at Scale 39 Engineering Challenges

This book collects challenges engineers face when building iOS and Android apps at scale. By scale, I mean having numbers of users in the millions and being built by large engineering teams. These teams launch features continuously and still ensure the app works reliably, and in a performant way.
This book is a summary of the current industry practices used by large, native mobile teams and points to some of the common approaches to tackle them. Much of the experience conveyed in this book comes from my time working at Uber on a complex and widely-used app. More than 30 other engineers working in similarly complex environments have contributed their insights; engineers building apps at the likes of Twitter, Amazon, Flipkart, Square, Capital One and many other companies.