Born in
Banjul, Jallow has played for
Real de Banjul,
Chievo Verona,
Cittadella,
Trapani and
Salernitana. On 31 January 2019,
Salernitana bought out his rights from
Chievo Verona, after he played for them on loan in the first half of the 2018–19 season, and he signed a four-and-a-half-year contract. On 30 September 2020, he signed a three-year contract with
Vicenza. On 12 August 2021, he joined
Fehérvár in Hungary on loan with an option to buy. On 11 August 2022, Jallow joined
Adanaspor in Turkey on a two-year contract. On 22 August 2023, he joined Algerian club
CR Belouizdad. On 3 August 2024, he joined Italian club
Fidelis Andria 2018.{{cite web ==International career==