Rakata was a temporal engineer. He was known for designing one time travel device: the Teenage Device. It was seized by the Department of Temporal Investigations.
He was also a contemporary of Catherine Mouranger in high school, attending the Institut de Marquain at the same time she did, and he completed the Teenage Device around the time when Dunames Lopez was in high school. (Star Trek: False Vacuum: "Dear Sixteen-Year-Old Me")