The competitive Business Development area requires applicants to have quite a lot of competence. Therefore, an intern is necessary for most, and Berlin is a at present great place to look for one! Companies are looking for both Business and Sales employees within this area. You should be familiar with areas like Sales, Account management, and B2B - they are very commonly mentioned in job offers. Search / Recommendations at present is out in front with 10% of companies that are looking for candidates, followed by Automotive (8%), and Travel (7%).
Getting in on the ground floor has never been easier for Business Development applicants. 63% of companies advertising these kinds of jobs are startups. Why not have a look at jobs in another country to compare and contrast opportunities. Just use the Explore tab.