Most of french people in engineering jobs in France are working late even tho overtime is never paid.
But it's worth pointing out that the U.S.'s famous 9-to-5 is completely inapplicable to any sort of high-demand job. For many people in a demanding profession like tech, a 9-to-5 job would be an absolute (and often unattainable) dream. Where I live (Washington, D.C.) people who want a 9-to-5 will generally leave industry altogether and work for the government. (And even there, a true 9-to-5 can be elusive.)