I'm a designer, turned into a front-end developer, then turned into a back-end developer. Having sat on both sides of the table gives me a good opportunity to value both what's under the hood and what's visible to the user on the dashboard.
I write mostly Node.JS and deal with real-time applications based on Socket.IO.
I still design, I still do front-end coding, and also back-end coding. And it's awesome ;)
Some applications I work with - Listhings and Pipedrive