Dear Sir or Madam,
I have a level C1 in German, and I have done recording projects previously, which I believe that would be benefitial for this particular project.
Since I am new to this platform, I can provide you with examples of previous recordings, or my profile on other freelance webpages.
I would be delighted to be part of this project, and work with you on the long-term.
I look forward to hearing from you.
Kind regards,
Stelian