I fix broken things. I add on extra features. I make the site do the thing. And I spend a lot less time working on my own site than I ought to.
My usual acronyms include PHP, SQL, JS, CSS. My regular vocabulary is peppered with drush, wp-cli, ifconfig, git, ssh, bash, apache, nginx, composer, apt-get update.
I work regularly with Sol Design Company. (I'm the one at the bottom, in the hat and black leather jacket.) Also Dogghouse Interactive.