What websites would allow me to get writing jobs for startups?

I'm between novice and intermediate as a web designer/developer, but can figure out how to write an article about any web design/JavaScript/Node/HTML5 tech that is thrown at me. I actually met a few people through HN a little while ago who wanted to work with me, and that worked out. Is HN the proper place for this kind of engagement, or is there another place that I should be looking?