The 21-year-old Abraham Ibrahim, who also goes by Avi Karni, was arrested on suspicion of child abuse offences in September last year after the parents of a 14-year-old girl found explicit images on her phone.
After exchanging messages, Abraham Ibrahim arranged to meet one of the victims outside London in June 2018, going on to commit a number of serious sexual offences against her.
He also communicated with another girl aged 14, who lived in London, meeting her several times and engaging in sexual activity.
In a victim impact statement read to the court, one of the victims said that she and her family had been ostracised by the Orthodox community, and she has subsequently suffered from post-traumatic stress disorder (PTSD).
One of the crimes took place while he was on bail, after being arrested and charged with separate offences.
Passing sentencing at Snaresbrook Crown Court on Friday, His Honour Judge Alastair Hammerton said: “I find your use of social media to be extremely manipulative.”
Of one of the victims, he added: “You played on her good nature… You started sending her porn links. You would not let her escape.
“I am satisfied your use of social media was an example of grooming. You convinced her to meet you on her own."
Ibrahim is a Yemenite Jew who was brought to the UK as a child by London’s Satmar Chasidic leaders.