David Jandi's career began under the guidance of the classic masters. In Nagybánya, his teachers were Károly Ferenczy, János Thorma and István Réti. Without having been to Paris, his art aligned itself with the Neos trend. He spent nearly all his life in Nagybánya, with a few winters in Budapest. He preferred Rome, Florence, Venice, Taormina over Paris.

Spell-bound by the Italian landscape, his colours became heated with a warm devotion and mysticism imbuing his painting. Though also influenced by Neo-Classicism, he never shifted towards idealization or cool objectivity, but preserved full-blooded realism throughout, even if this realism was tinted by a sort of generalizing or metaphysical abstraction. His palette is enthralling: ultramarine blues, turquoise greens dardk purples and intense yellows light the pictures with a deep inner glow.