My colleague Willem always amazes me: the backend developer; with his insights into design. It's he who recommended following a blog — it's more like a newsletter — about web typography.

This course broadened the way I think about fonts, and it's the primary reason my own blog, this blog; looks the way it does. Whether you're a frontend or backend dev, everyone should have basic knowledge about typography, and I'd recommend following the course over at betterwebtype.com to do so.