Quyum Miah, 41, from Homerton, was found guilty of the murder of 40-year-old Yasmin Begum.
Miah had pleaded guilty at an earlier hearing to theft and two counts of fraud at the Old Bailey.
He was remanded in custody ahead of sentencing at the same court on Friday.
The victim’s brother Atik Zaman said: “Firstly we would like to extend our heartfelt gratitude to the detectives who worked so tirelessly to collect the evidence that caught Yasmin’s killer. Without their efforts, he may have gone on to put another family though this nightmare.
“Today an evil creature was found guilty of murder, fraud and burglary. A creature that should never be allowed to walk the streets again. He choose to murder a daughter, a mother, a sister for no reason other than financial gain.
“He values life at £800 as that it what he stole. He broke into our sister’s home and brutally murdered her then robbed her. We hope that he gets reminded every day of his measly existence, how evil he is, and what awaits him in the next life.
“We ask that our privacy be respected as we try to pick up the pieces and go on with our lives without Yasmin.”
Ms Begum was found collapsed inside her address in Globe Road, just after 4pm on 24 March 2022 after concerned school staff attended her home when she failed to collect her children from school.
She had been stabbed several times and items, including her bank card and jewellery she was wearing, had been taken.
She was married to Yasmin but the pair had been separated for about a year, and divorce proceedings were under way. Attention quickly fell on him, and detectives swiftly began to piece together his movements. Forensic analysis of CCTV, together with dynamic interventions to secure evidence ensured a compelling case was compiled against Miah.
Miah entered his wife’s flat and savagely attacked her. He stole her bank card and items of jewellery before fleeing the address, locking the door from the outside as he left.
In the hours after the murder Miah used his wife’s bank card to withdraw £800 in cash two days later he also pawned two items of her jewellery for around £200.
Detective Chief Inspector Larry Smith, of the Met’s Specialist Crime Command, led the investigation. He said: “Quyum Miah is a violent coward who ambushed Yasmin in her own home and brutally attacked her – she did not stand a chance. Whether Miah was motivated by jealousy due to the impending divorce, or greed due to his callous actions in withdrawing cash and pawning jewellery immediately after the murder, remains unclear as he did not provide any straight answers during his police interviews.
“Instead he refused to own up to his actions, continually lying and then changing his story when concrete evidence disproved his version of events.
“Yasmin was a young mother, who was about to embark on a new chapter of her life away from Miah. However, she was denied that opportunity in the most violent of circumstances.
“Miah has rightfully been found guilty of murder and will now fact the consequences of his actions. I hope his conviction provides some small solace to Yasmin’s family and those who knew her.”