What are some red flags one can encounter as an interviewee for a software engineering position that scream "Do not work at this place!"?

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I don’t like to go by flags but rather gut feeling. A red flag is anything that trips your gut ‘sensor’. If I wanted to get real paranoid, I’d go on Glassdoor and read reviews, or I’d track down some former employees and ask them how it was like.

That said, I’m particularly resourceful and I’ve never had a job that I truly didn’t like. I can usually find ways to make bad jobs better.