In Paris Roubaud was a student of painter Louis Hersent. From 1833 to 1847, he exhibited at the Salon genre paintings, landscapes, portraits, still lifes in the way of the master, and became a painter of an honorable place. After 1840, he was correspondent in Algiers of the magazine L’Illustration and at the end of his life, treated subjects related to Algeria.
It is as a cartoonist and caricaturist that he showed the fullness of his talent. Alongside artists like Daumier or Grandville, he collaborated from 1830 to 1835 with La Caricature and Le Charivari, illustrated satirical newspapers directed by Charles Philipon (of whom he drew a portrait charge, as well as with other newspapers such as La Mode. From 1839 to 1841, he realized for the Galerie de la presse, de la littérature et des arts and the Panthéon charivarique, portraits of personalities among the most influential of the time which now make prominent historical documents (100 boards).