I'm curious to assess if people separate front end designer / dev with front end engineer. I just don't know too many people with a rich design / artwork talen

I'm curious to assess if people separate front end designer / dev with front end engineer. I just don't know too many people with a rich design / artwork talent as well as heavy javascript programmer mind. Maybe I just don't know enough people. I suppose when you have a massive web app, you call your people front end enginers because there are twenty of them and they don't have to create an entire UI, they have been able to focus on specific issues and manipulating the DOM.