That could be the case! But was it clear in the article? I just reread it and the author doesn't indicate where he works at all. He does, however, quote himself saying: "[...] I’m pretty sure I’ve written that exact code?"

Not 'related' or 'similar' code, mind you. Maybe that's where I assumed he was part of the team.

If you're right and he doesn't work for the company the piece becomes pure speculation.