Recognition of Occupational Qualifications
It is very likely that foreign job applicants will at some point in time need to have their professional qualifications obtained outside of Germany compared with the German equivalents in order to be recognized in Germany. That is, they will be issued a Statement of Comparability. Some professions in Germany, such as medical specialists or lawyers, are regulated and recognition is necessary. For many others it is not required but helpful. Smooth recognition of school certificates and university degrees can be expected if these were issued in another EU/EEA country or a country that is a signatory of the Bologna Process. In any case, expect to pay several hundred Euros for this process.

Self-Employment in Germany
Besides taking up employment, the nationals of third countries can set up their own business in Germany. The new initiative seeks to recruit business-minded foreigners from third countries who will create new innovative jobs in Germany. They will, however, need to prove that there is a demand for their products or services in the German market, that their business will benefit the German economy and that they have secured financing for their project either through their own capital or already pre-approved bank loan. Successful candidates are eligible for a residence permit for self-employment. Likewise, talented foreign freelancers can apply for a residence permit for freelance work. This website should help you answer some questions regarding setting-up your own business in Germany.