> What are salaries like for mid-senior level software engineers working in tech companies in Paris?

Looking at what StackOverflow's Jobs tab spits out right now, I see: software engineer Java 38k-60k; software engineer Python 40k-55k; DevOps engineer (not your idea, I guess? there's a number of these) 40k-55k; developer for 3D applications 38k-48k; ...

Then there is one for a senior Java engineer for 47k-59k and right above another one for a senior Java engineer for 60k-120k.

These numbers are gross. Based on other posts, deduct 35-40% to account for things taken out of your paycheck (including health care) plus the income tax and rental tax you have to pay after. Rent for a small apartment in Paris starts about 1000 Euros per month and rises steeply.