New top story on Hacker News: Ask HN: What are must know concepts for back end development?

Ask HN: What are must know concepts for back end development?
293 by chrisdsaldivar | 72 comments on Hacker News.
I’d like to learn more about backend development but most of what I find while searching are results like “Build a nodejs backend in 20 minutes” or “learn backend development in an hour.” I think part of the problem is I don’t know enough to ask the right questions.