No one works 35hours in software jobs in france except maybe government. Overtime is also not compensated (they give some days off that is it.)
Even in government; I've worked 50+ hours weeks working for the healthcare branch of the providence state, with a classic 39h/w contract. No compensation of any sort, despite having timesheets.
There are a lot of myths about French worker. Our lifelong worked hours is not exceptional; our productivity is also not exceptional.
Pointless suffering. Report violations to the CSE, Médecin du Travail, and Inspection du Travail.
It was a choice, I loved my job there. I had more exciting projects than most of my friends in the private sector!
Excellent way to get blacklisted and never work for the State again if you're a contractor, or end up in a low impact, boring job if you're a career worker.