I just graduated from Ecole Centrale Paris, usually second on engineering school rankings after Ecole Polytechnique. I found a job in web development in a small startup in November and am making ~45k a year.
40-45 for master's degree from a very few select schools, like the one from the OP. (Think of it as an equivalent of MIT/standford/harvard. Only a few hundreds lucky people get out of there every year).
35-40k for master's degree from everywhere else.
If you don't have a master's just forget about it ^^
But that was not the point, the point was that people talk about "raw", or "after taxes", while it does not mean the same. In France when they talk about "income after taxes" (~23% salary taxes), it is before the equivalent of US Federal+State taxes. These ~23% are about "social contribution" (mandatory healthcare, retirement, unemployment, etc.).
Only then, the income taxes are computed on what remains, depending on your family situation (having children impact a lot in France compared to the US). For a single person it can be up to ~ two-months salary.
35-40k for master's degree from everywhere else.
If you don't have a master's just forget about it ^^