First off, you are right. Artisans during the industrial age were increasingly employed for factory production. That's still not working for a patron. Second

First off, you are right. Artisans during the industrial age were increasingly employed for factory production. That's still not working for a patron. Second off, the OP asked about a name for "engineering postings for our company". That's part of a factory system. If anything, the term "artisan" is even an more appropriate description. Factories and employment lead to the near demise of artisans, as that last reference I gave suggests. The use now is a revival of the original handcraft sense, which is why that's what I covered.