On 25 July 2018, Jahanbakhsh transferred to Premier League side Brighton & Hove Albion for an undisclosed club record fee, signing a five-year contract.
He announced on his Instagram that he will wear number 16, the same number he used to wear in his first season at NEC.

On 11 August 2018, Jahanbakhsh made his debut for Brighton as a substitute in the club's opening match of the Premier League season against Watford.
Even though he played 25 matches in the season due to injuries and poor performance he amounted no goals and no assists.
On 25 July 2018, Jahanbakhsh transferred to Premier League side Brighton & Hove Albion for an undisclosed club record fee, signing a five-year contract. He announced on his Instagram that he will wear number 16, the same number he used to wear in his first season at NEC.
On 11 August 2018, Jahanbakhsh made his debut for Brighton as a substitute in the club's opening match of the Premier League season against Watford. Even though he played 25 matches in the season due to injuries and poor performance he amounted no goals and no assists.
Alireza Jahanbakhsh