As a datapoint, in Germany it is not considered "hidden employment contract" unless it is more than 80% of your income. I could imagine some similar rules in France, but I do not know.
An alternative way that probably works in France too is to have a limited company and invoice from that.
ah yes of course, if it really "one of many" jobs it's fine in France too. What I understood from the conversation was people trying to do this for a "100% job"
An alternative way that probably works in France too is to have a limited company and invoice from that.