I was originally a chip designer. Then I shifted into embedded development. Now I'm mainly a C# guy.
But when I shifted into embedded development, I also shifted into doing power engineering. I grabbed a couple of books on the topic at hand, taught myself a lot, and designed the electronics to meet the need. We sold the product to city utilities.
I remember one time I was in a room with probably 10 engineers from one of the utilities. After having described the product to them, and went through a lot of our settings and stuff, I was explaining the difference between two of algorithms we put in (because different utilities use different algorithms, and I just wanted one device that could do both). At some point I was like "which of the two algorithms do you use?" and one responded "well, which do you recommend?" So I talked about why I thought one was better than the other.
They all started looking at each other and nodding and saying "Yeah, that's the one were going to use." I realize I could have said anything at that point and they would have agreed. They thought I was expert. And that was my "last two frames" of this comic moment.
Now as a senior dev, I've seen enough shit to realize that most people have no idea what is going on, and are flying by the seat of their pants. So I figure my ignorance is a little less than theirs, and that gives me a lot of confidence, but I also realize that I can learn a lot from most people.