I am convinced that impostor syndrome is just the other end of the spectrum from the Dunning-Kruger effect.

That doesn't necessarily mean that having impostor syndrome means you're an expert, but that you have the curiosity to look under the surface and get a glimpse of the long path ahead of you. You don't just assume you "got this" because one piece of many clicked into place.

I guess my strong impostor syndrome has mellowed over these past 5 or so years while I have been working on myself (as in mental health, not job skills, lol). Some of it is confidence gained by knowing better who I am and what I want out of life, accompanied by elimination of a lot of "I should be learning this / doing that / building my career XYZ" thoughts. And part of it is leaning into what makes me different from others at work versus the others, using that stuff as strengths rather than seeing them as deficiencies where I don't match up.

That's the ticket to be a good software programmer, well done! 😁

It will when you realize the people in your room are mostly talking but actually have no clue.