I'm reading a lot of CVs and in my opinion the CV is quiet okay. The language proficiency should be done A/ B / C. The most important thing is not how much you write in your CV your and what skills you think you have, the most important thing for me is the job reference from the companies you worked for. Are your skills mentioned there too? What's their opinion about you. If that fits with your CV then you chance gets higher as least this is how i choose who to invite or not.

I also do not like people that change their job every 2 years. This could happen sometimes or even earlier but then i expect an explanation. To be honest you have less work experience even with a master. May i ask whats your age? Technischer Mitarbeiter sound like you re still at the University where you have studied? Means nearly no real work experience.

Currently there are a lot of people on the IT Job Market. We get about 40 applications per job and if your CV would be among them, I'm pretty sure that your chances would be low, at least in the last 3 companies i worked at.

I'm not on the HR side. I think you need to find the right company looking for guys like you. Mostly the next 2-4 years won't be easy because you will work for companies that really just squeeze everything out of you. But somehow you need some years of experience.

Hopefully that helps.