There aren't very many Java jobs in Saarbrücken; the current count is just 7. Why not check out nearby locations on Jobspotting? ARIS Express and Android jobs as the main columns will yield many vacancies to those at this time seeking a new challenge. The most mentioned topics for these jobs are Backend Development, Scala, and Java EE. Are you familiar with them?
Those looking for senior Java jobs will be glad to hear that 85% of roles in this area are for experienced recruits. There aren't at this time any internship positions available in this field. There aren't currently any startups in the current companies on Jobspotting looking for Java competence. Why not have a look at vacancies in another country to compare and contrast opportunities. Just use the Explore tab.