I'm the author of the article and I asked myself this question before I wrote it. I posted some data here which came out of that research: https://news.ycombinator.com/item?id=5272763 but it didn't get much traction. When I compared across disciplines in the original dataset (using software programmer as the discipline) there wasn't a strong indication that they were more prone to suicide than other professional jobs. I don't remember exactly but doctors, lawyers, dentists were toward the top of that list.

One challenge is that the dataset I reference doesn't have data post 1998. Since our discipline has grown and changed since then a more recent dataset might show something more interesting.