I've thought about the optics of talking about my own automatic job application system or including it on my resume, but I thought it'd be risky given the topic (like how listing your own startup is frowned upon, if I'm not mistaken?). Is it normally considered a bit risky or taboo?

well, it was during the technical interview, and it was just a couple of engineers doing the interview. I was just geeking out on all the problems I was solving (and creating).

and to be honest, I was too nerves to think about if it was risky or taboo.