Bence Kocsis was born on 23rd April 2001 in Marosvásárhely, Transylvania. He moved to Hungary at the age of 11 after being selected by the Puskás Academy following a trial. The left-footed midfielder, who can play in several positions, has played in all age groups in Felcsút since U13, and in the 2018/2019 season he became one of the key players of PAFC II in NB III. That season, he made two starts against Vidi II, also in NB III. In addition to his assists, he found the back of the net seven times, earning him a spot in Puskás Akadémia's NB II affiliate team in Csákvár for the following season. In two seasons, he played a total of 58 NB II league matches for the Fejér County team and scored four goals.

In 2021, he signed with MTK, where he made his NB I debut, and then at the beginning of 2022, he became a player for Paksi FC. He spent most of the 2022/2023 season on loan at PMFC in NB II. The following season, Paks loaned Kocsis out again, this time to Budafok, before he returned to the Tolna County club in the winter. He spent the previous season on loan at BVSC. He has also played for the U17, U18 and U19 national teams.