Ask HN: What to consider joining early stage startups

Hi Friends, I am engineer with about 12 years of experience in two big tech companies. I want to join early stage startup to experience the early stage hustle of startups.

Like everyone else, I am definitely interested in the early success and equity but also want to grow the company myself.

I wanted to understand what are the kind of things I should consider joining early stage startups and what are typical red-flags to watch out for?

Thank you.