[namdnay]

There are two legal ways to do this:

1) The company opens a branch in France, with as director and sole employee the person in question. Employment contributions are collected on the money that the French branch pays to its (sole) employee. Very simple to set up, does require a bit of work from an accountant for the yearly accounts (I'd say to budget about 1kE/year)

2) The employee joins an IT contracting company that already has a commercial presence in both countries, they will take 10% of the take (known as "portage salarial")