One of the things I like about the residency program, and google brain in general, is the openness of the research environment.
For example, it is easy for us to release open source code related our research, and in fact we are even encouraged to do so.
Some of us even continue to write personal blogs about machine learning research work done in the program.
In addition to open source projects such as tensorflow, people on the team also contribute and develop other open source libraries such as pybullet, rather than using proprietary, closed-source physics libraries.