Jewish existentialism is a category of work by Jewish authors dealing with existentialist themes and concepts (e.g. debate about the existence of God and the meaning of human existence), and intended to answer theological questions that are important in Judaism. The existential angst of Job is an example from the Hebrew Bible of the existentialist theme. Theodicy and post-Holocaust theology make up a large part of 20th century Jewish existentialism.
Examples of Jewish thinkers and philosophers whose works include existentialist themes are Martin Buber, Joseph B. Soloveitchik, Lev Shestov, Benjamin Fondane, Franz Kafka, Franz Rosenzweig, Hans Jonas, Emmanuel Levinas, Hannah Arendt, Rabbi Abraham Joshua Heschel, and Emil Fackenheim.