Jeetender Singh was found guilty of pretending to help his victim by offering to share a taxi with her after meeting her on the night out on Valentine's Day in 2015.
But he later barged into her flat in north London and sexually assaulted her as she lay dizzy and tired on her bed.
"You had responsibility in a well-paid career but you have thrown that away as well as your good character," Recorder T Green at Blackfriars Crown Court told Singh yesterday.
Singh was traced with the help of the driver, who showed police a cash machine he had used during the journey,the 'Evening Standard' reported.
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"It was a place where she should be able to feel safe, to collapse, and to sleep it off. You assaulted her while she lay on her own bed dizzy, nauseous and desperate for sleep," Green said.
His lawyer Samuel Stein said Singh had since taken redundancy as a compliance executive at JP Morgan and posed a low risk of offending again.
He also told the court Singh's brother was setting up a property development company for him to work at when he is freed from prison.
In a victim impact statement, the woman said she had moved home following the attack, which took place in the early hours of February 14, 2015, and remains traumatised.