This led to Julien Duvivier asking him to collaborate with Vincent Scottoon the soundtrack of the 1937 feature film Pépé le Moko starring Jean Gabin.
In the 1930s also Iguerbouchène became the co-proprietor of a bar-restaurant and cabaret, ‘El Djazaïr’ (‘Algiers’ in Arabic), on the rue de la Huchette in the Latin Quarter of Paris.
In 1938, he met the singer Salim Halali in Paris (who was originally from Annaba), with whom he composed approximately fifty songs, mainly in an Arabic Flamenco style.
[6] During World War II, Iguerbouchène was a Nazi collaborator, managing the musical direction of the regime's Paris Mondial propaganda broadcasts targeting North Africa.
[7] At the closure of the War he was not prosecuted for treason by the French government due to the protection of a high official.”[8] In early 1945, Iguerbouchène composed about 100 songs based on poems in Thousands Nights by Rabindranath Tagore.
[9] Iguerbouchène also composed for the 1962 French short Le songe de chevaux sauvages, directed by Albert Lamorisse about wild horses in France.