If front end work is important to your company and you want to invest in that competency I would suggest a little on the job training. I've been teaching myself

If front end work is important to your company and you want to invest in that competency I would suggest a little on the job training. I've been teaching myself a little more coding and the hard thing for designers is knowing what good code is. Design school training doesn't really get into many technical subjects, so sharing some websites, books, etc. with some of those ideas fleshed out would help a lot. If you can spare the time a code review would be another approach that could pay huge dividends over time. Imagine the situation was reversed, you knew how to use Photoshop passably, but were weak on aesthetics. What would you be looking for helpwise. If it isn't so important, then I would hire a front end engineer and outsource design work. You can find passable designers easier than passable engineers, IME.