Looking for German SEO Content Writer

I am looking for a German content writer who has a really good grip on the German language and has a good idea of SEO content writing. It's a year-long project in which I promote my gambling client on different types of websites based niches such as Technology , Finance, Business , Sports , Entertainment etc, with the help of articles. So from the content writer what i am looking for is an article in which my client link is placed naturally. It should not look forced or just for advertising. So by naturally what i mean is say I want a tech article from on the below