Hello,
Many thanks for inviting me to bid on your project. I am a Copywriter and SEO expert with several years of experience, so I have the skills you are looking for. The only detail is that I am not a native German speaker, so I wouldn't be able to offer you this service in German.
However, if you are also looking for a Copywriter in other languages, specifically Portuguese (Brazil) and English, I would be the right person for the job! Please let me know if that is the case, and I look forward to hearing from you soon!
Kind Regards,
Daniel