He lived in Navadwipa and was a brahmana belonging to the ninth branch of Lord Chaitanya.
Mahaprabhu's father, Jagannatha Mishra, also possessed this title, "Purandara Acharya," thus Mahaprabhu addressed Purandara respectfully as "father". Hence, Purandara Acharya is to be considered most fortunate because the Lord used to greet him by addressing him as His father and embracing him in great love.
It is described in the Chaitanya-bhagavata that whenever Lord Chaitanya Mahaprabhu visited the house of Raghava Pandita, He also visited Purandara Acharya immediately upon receiving an invitation. (CBh. 3.8.31, CC. 1.10.30)