As a mobile codebase grows, there are new types of challenges developers must tackle. One of the common challenges is the scalability of build systems like Gradle. Uber, Google, and Facebook use Buck and Bazel to work with large codebases. In this talk,Kurt Nelson and Gautam Korlam will talk about how alternative build systems impact both the developer experience and the performance of builds. You will also learn if, when, and how you should switch to them for your own code base.