1. Job offers at Freie Universität Berlin
On Mondays, Freie Universität Berlin publishes its jobs vacancies list with current job offers in all disciplines and qualification levels, including job advertisements for pre-doctoral research assistants (doctorate implied).
You can also find job offers by structured doctoral programs here.
2. Job offers at other German universities
Most German universities have a central job vacancies list like Freie Universität Berlin. You can find this service on the respective start page and will often be able to subscribe to it.
3. Doctoral positions at extra-academic research institutions
You should definitely take into account extra-academic research institutions when looking for a PhD position. In cooperation with universities, these institutions offer excellent research environments:
4. Job offers throughout Germany
The online job portal academics.de lists advertisements for PhD positions throughout Germany. You can sort the job offers according to disciplines and subscribe to a weekly newsletter for your profile. In addition, you can search for suitable scholarship options.