Congratulations on your (past) offers Javier!
Xiaohan Zeng

that’s my point, I’m not that strong as developer compared, for instance, with some of my best students. But, my students told me they were really nervous during their interviews (yes, recruiters tried to hire all my Lab, but that is another history) and suddenly they were struggling a lot.

So, maybe, given that I have the experience all questions at interviews seemed as “I know this problem from somewhere”. Maybe, it could be a good idea to work as developer 1–2 years before applying to the top 5.