MagniX’s chief technology officer, Riona Armesmith, works on electric propulsion systems like the one in the background at the company’s headquarters in Everett, Wash. (GeekWire Photo / Alan Boyle) This article originally appeared in GeekWire. Editor’s note: This is part of a series profiling six of the Seattle region’s “Uncommon Thinkers”: inventors, scientists, technologists and entrepreneurs transforming…