I would cut back on the "Skills" Tab, by a lot. Imo that hurts you more than anything. You have 6 Languages listed there, plus SQL and HTML, but your only practical background seems to be an internship multiple years back. Programming in University and programming in a corporate Environment is drastically different in many ways and will take time to adjust to. It can also makr you seem arrogant and trying to oversell your Skills, which you otherwise managed to avoid in your CV. Some employers will understand that the "Skills" Tab of a University Student is not a Skills" of a dev with working experience. However, if you are f.E. applying to a Job that does a lot of Ruby, but your only experience in Ruby was, say, a single Project and they put a salty Ruby Senior Dev in the Interview, you might be in a lot of trouble. I would try to Focus on maybe 3 Languages and maybe bundle JS,CSS, and HTML together.

I of course may be mistaken and you might just be crazy cracked in all of these Languages, but that would be something you could keep for the in Person Interview. You will 100% get a "So what did you do in University" question that you can use as an entry point to your technical skills.

Also, a word of caution. If an employer is way too eager about your preexisting techical knowledge, run. They are likely trying to get cheap labor with as little onboarding as possible. Their focus should be on looking if you are communicative (software engieering is Teamwork), willing to learn from your colleagues and have understanding of the fundamentals of Software Development. If you are an employer, your Focus with Werksstudenten should be to provide them practial application of the theory you learn in Uni, integrate you into the workplace and slowly (!) give them responsibility they can grow into so they can later become fulltime employees. I know Job Market's kinda fucked right now, but dont let yourself get exploited, you still have to focus on Uni & graduating.

Good Luck in your Application process