Pros
I work(ed) in the Palo Alto office. * The Paris office is excellent, with some brilliant hard working individuals. * People are willing to help and do not judge you for asking stupid questions. It is in fact encouraged, and hierarchy does not matter. * High code quality standards, atleast in the projects that are Paris based. * A nice mix of European and US culture. * Excellent standards, the managers know their engineering and are not just setting up meetings. It is not possible to hide BSing.
Cons
* HQ being in Paris creates great challenges, while everyone on the Paris side is super helpful, the time difference just does not work. Most infra is in Paris and you could find yourself stuck until the next day, which is not the fault of the Paris folks, just a time difference thing. * HQ being in Paris makes the promotion process non-transparent, people who put their head down and work hard can be overlooked for people who are buddies and hang out outside of work hours. * Some of the code that Palo Alto and Ann Arbor teams work on; does not belong to 2019.