Ask HN: Resources to move from intermediate to advanced programmer?

Today you can find a lot of information about how to start programming and tutorials for beginners. I find myself in the situation that I have 7 years of experience behind me and want to continue learning in a didactic way. I am a faithful reader of technical books where I learn a lot, but objectively, the way I have learned best has been following some online courses where teachers taught in a practical way and from the real world concepts such as hexagonal architecture, ddd, SOLID and a great repertoire of concepts that I consider important to be a good software professional. That is why I ask you, what resource (book, course, youtube channel...) has been the most useful for you in your career?

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