Before focusing on mobile apps I spent about 6 years working with web technology at various companies. I spent a lot of time with Flash and ActionScript but also worked with more standard front end web technologies like HTML, CSS, PHP, and WordPress. I've even made a few installations using Processing.
Red Tettemer is a brand advertising agency that not only had a massive traditional offering (print, audio, video) but also offered digital services before it was all the rage. They were my earliest employer and offered a ton of flexibility to explore both technically and creatively. I worked on promotional Flash and HTML websites, online gaming, feature phone skinning OS skinning, interactive installations, and motion graphics video.
Straight out of college I worked with local small businesses and artists to create websites, printed materials, and animations. I also consulted over the years, helping business fix or find solutions to their particular problem. Sometimes being in house was the most effective way to get things done so I've also done 3-6 month stints at some digital agencies.