Shalini Padmanabha will be sentenced later this month.
The baby died in August 2017, after suffering several injuries including broken bones and a suspected bleed to the brain.
Shalini Padmanabha, 33, was found guilty of manslaughter and child cruelty.
She will be sentenced later this month.
Emergency services had rushed to an address in Epping New Road at around 3am on Tuesday, 15 August 2017 when the child was found unresponsive.
She was taken to hospital but died there a short time later.
A post-mortem found the child had suffered a number of injuries including fractures to the skull and ribs, and there was evidence she had had a bleed on the brain.
It also determined she had died as a result of a severe head injury.
Padmanabha and a 39 year-old man were arrested on suspicion of murder, but he was later released without charge.
She was charged with murder in February 2018 but denied the offence.
During a three-week trial at the Inner London Crown Court, the jury heard from several experts that these injuries ranged from being days old to more than four-weeks old.
They also gave evidence that certain injuries could not have been the result of an accident and indicated the child had been assaulted on more than one occasion.
Padmanabha claimed the injuries were a result of the child “wiggling a lot” when in her Moses basket, swing or on the floor.
But she was found guilty by the jury and will be sentenced on Friday 19 July.
DCI Stephen Jennings said: “The death of a child is always tragic but when it comes as the result of the actions of another person it is heart-breaking particularly from a parent whose main responsibility is to take care of their child.
“Shalina Padmanabha subjected this baby to violence which ultimately led to her death.
“That is something she will have to live with for the rest of her life.”Tags: Buckhurst Hill, Epping Forest
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