Korboa, who can play out wide or as a central striker, has signed for the Cobblers after a successful pre-season spent with the club.
Korboa scored 15 times for Carshalton in 2018/19 and won five of the club’s seven player of the year awards, and added a further 16 goals before the 2019/20 season was cut short because of COVID-19.
Korboa has signed an initial one year contract, with the option for a second year.