I've been studying STM32 and PIC32 microcontrollers and C/C++ language. I wonder what new skills I have to learn to get into the embedded systems jobs. Does someone know what issues to lean?

 

Start making things.

IoT device is a good start point

 

I would definitely take a course in basic electronics, if you haven't already.

We have a constant stream of "programmers" come thru here because they don't understand how to connect a peripheral to a micro.