OpenTrain AI is seeking a remote Parametric CAD Model Review Engineer to create, modify, validate, and review FreeCAD models, mechanical assemblies, and technical drawings for AI training. Candidates must have advanced proficiency in FreeCAD (or equivalent parametric CAD platform), at least two years of relevant mechanical/product design experience, and knowledge of GD&T and DFM principles. The position is open worldwide for flexible, part-time contractor work conducted in English.