Designers move from idea to a wireframe, a prototype, a logo, or even just a drawing. Developers move from a problem or feature to a coded solution that is solved and released. Both are creative, both are in aid of the end-user. The Design Engineer role is also creative and authors code but systematically translates a design towards implementation in a structured way.  I have never worked anywhere where there wasn't someone trying to close the gap. This role is often filled in accidentally, and companies are totally unaware of the need. Recruiters have never heard of it, and IT consultancies don't have the capability in their roster. We now name the role "Design Engineer" because the gap is widening, and the role has become too complex to not exist.