The Leibniz-Institute for Astrophysics Potsdam (AIP) invites applications for the Karl Schwarzschild Postdoctoral Fellowship 2023 in the broad area of galactic and extragalactic astrophysics, with an emphasis on the following topical areas: Milky Way and the Local Volume, Dwarf galaxies and the Galactic Halo, Galaxies and Quasars, Cosmology and High- Energy Astrophysics. The Fellowship is awarded for three years and may be extended to up to five years.