Is it possible to write a proposal to get a junior professor position in Germany, when existing openings seem far from my research interests? It has been several months that I am looking for a juniorprofessor position in German institutes. Basically there are just a few opening which are far from my research interests. I have a good publication record and I was involved in writing funding proposals. Is it possible to write a proposal to ask for a professorship position? 

P.S. My research lies in computer science and electrical engineering.
Stephan's answer is generally correct, but I get the feeling that this is not what the OP has in mind:


  Is it possible to write a proposal to ask for a professorship position?


I take this to mean whether it makes sense to essentially do a "blind application" for a professor position (i.e., send to a university that is not currently conducting a suitable search an application to the extend of "here are my credentials and a research proposal, please create me a position"). The answer to this question is a pretty resounding no. This will only make you seem out of touch with how academia works.