That’s a dude
Belief in the eventual coming of the mashiach is a basic and fundamental part of traditional Judaism. It is part of Rambam's 13 Principles of Faith, the minimum requirements of Jewish belief. In the Shemoneh Esrei prayer, recited three times daily, we pray for all of the elements of the coming of the mashiach: ingathering of the exiles; restoration of the religious courts of justice; an end of wickedness, sin and heresy; reward to the righteous; rebuilding of Jerusalem; restoration of the line of King David; and restoration of Temple service.
Modern scholars suggest that the messianic concept was introduced later in the history of Judaism, during the age of the prophets. They note that the messianic concept is not explicitly mentioned anywhere in the Torah (the first five books of the Bible).