So in the end including your taxes, you have 29k to live with (19k if you remove the rent) while costing 75k to your employer.
Ladies and gentlemen of the world, this is what is costs to have our (indeed very nice) social security/health insurance !
For information in Paris, currently I'm at ~50K a year "Brut", which means ~35K a year "Net" ("go home" salary).
I'm costing ~75K per year to my employer in term of salary (there are taxes on his side to).
My rent, for a small flat (22 square meters) in Paris is around 10K per year.
My taxes are around 6K per year.
I'm an SRE/software engineer with ~8 years experience.