Rubin was born to a Jewish family, the son of Paulette and Ken Rubin.[9] His mother is a psychiatrist and his father a veterinarian.[10] He grew up in Lafayette Hill, PA where he started a ski-tuning shop in his parents’ basement when he was 12[11] and two years later - using $2,500 in bar mitzvah gifts as seed capital and a lease signed by his father - he opened a formal ski shop in Conshohocken, Pennsylvania.[9]