Bazel is Google's own build tool, open-sourced in February 2015.

Bazel has built-in support for building both client and server software, including client applications for both Android and iOS platforms. It also provides an extensible framework that you can use to develop your own build rules.

This talk will present the mechanisms that enable Bazel to deal with the scale of software made at Google while guaranteeing reproducibility of builds. It will also cover the challenges the Bazel team faced to open-source such a large tool and the future of the Bazel project.