bricoleur
A person who constructs bricolages; one who creates using whatever materials are available.
The engineer has science to guide him; the bricoleur has intuition. Significantly, while the bricoleur can only classify perceived differences, the engineer's scientific system enables him to classify things not yet seen.
Where it comes from
From French bricoleur; apparently a borrowing from the work of French anthropologist Claude Lévi-Strauss.
Adapted from the Wiktionary entry bricoleur (CC BY-SA 4.0).