What more about C++ could I nearn?

Question

Greetings everyone!
I'm just finishing learning C++, I mean there are no really more trainings that I wouldn't allready know (data structures, algorithms, loops, pointers, classes, file operations, vectors, containers, oop: inheritance, polymorphism, abstraction etc).
What next should I do before looking for job as cpp programmer? I know there's many frameworks such qt etc, however there are so many different variables in recruting and I'm looking for some universal things that could help me in any job as back-end dev. Maybe boost? Maybe some specific libraries?

Some1 can help, please?

PS. I'm allso looking for advice about choosing app builder to code for android in c++, somethink easy to start with and beeing enough to make simple apps, such calculators, small databases etc

Answer 1

I never sayed I know everythink, however thank You for link.

edited//:: PS. I've just read the article and this is a bit missconception acording to my post. We are talking about two different things.