The 19-year-old man was rushed to hospital by friends on Saturday night, where he was pronounced dead just before midnight.
The Metropolitan Police said they were called to Vallentin Road shortly after 11pm.
“The victim – a 19-year-old man – was driven by friends to a north-east London hospital, where he was pronounced dead at 11.38pm,” the force said.
“Officers believe they know his identity, but await formal identification and confirmation that next of kin have been informed.
“A post-mortem examination will be arranged in due course.”
It came less than 24 hours after a 20-year-old man was killed in a “senseless” stabbing at a house party in northeast London.
Two other people, a 17-year-old boy and a 24-year-old man, were also seriously injured in the incident, although their injuries were not life-threatening.
There have been more than 100 homicides in the capital so far this year.
Detectives are appealing for information over the shooting on Saturday night.
So far no one has been arrested and witnesses have been urged to contact police.
:: Any witnesses or anyone with information should call police on 101 quoting CAD 7639sep22, or contact Crimestoppers anonymously on 0800 555 111.