It's an Abrahamic, monotheistic religion that follows the Torah
Judaism does not have a single founder in the way that some other religions do, but it is traditionally traced back to the patriarch Abraham, who is considered the first to enter into a covenant with God. Other key figures include Moses, who led the Israelites out of Egypt and received the Torah at Mount Sinai. The development of Jewish beliefs and practices has evolved over centuries through various prophets, leaders, and scholars.
In modern-day Israel. Depends what event or series of events you consider to have been the 'origin' of Judaism; but whatever the working definition, chances are that it took place not too far from the geographic location in Jerusalem now referred to in English as the "Temple Mount".