It depends. If you like coding web apps, build a webapp; Il you like video games, code a 2D/3D RPG for example; Do you like algorithms ? Code your implemetation of data structures in language of your choice, or a famous algorithm like A*; Do you prefer desktop apps, or real-time apps ? Code an Electron app or a C++ daemon. Your only limit is your imagination (and your skills, actually) :) To my mind, the most important is not the number of languages you know, it's the numbers of side-projects, tutorials, scripts, etc, you share with the world on your GitHub that actually matters. Languages evolve, or change very often, but your coding skills get better only with practice. The only advise I would give you is : practice, practice, and share with the world !

Thank you for your very interesting point of view! Yeah, I'm the kind of guy who wants to always know how it works under the hood! I currently work in a early-stage startup, but in an environment (think as "market") where competition is not the key, and where you have to make the things "work", and not "work efficiently and neatly". I'm upset about that and that's why I want to change. I've never thought about how AI could solve security problems, that's very interesting. Maybe I could mix both AI and security! I don't want to stop programming now, so I think I would choose to be a security engineer.

I like it, but it seems too much like GitHub header...

This guy is a little salty... however he is right in a lot of points. Interesting article! 😊