The 35 hour work week is mostly implemented by getting additional vacation (on top of the base 25 days off) and (at least for engineers) some contractually agre

The 35 hour work week is mostly implemented by getting additional vacation (on top of the base 25 days off) and (at least for engineers) some contractually agreed overtime (that is already included in the yearly salary you negociate). For example, I have a legal 35 hour per week contract with 38h30 of work per week, the difference being compensated by about 15 additional days off and the rest paid in overtime. Where I work (large private company) working from 9 to 18/19 with a good hour of lunch break is quite standard (with administrative people tending to work more form 8 to 17).