Lubin made her first appearance at the Paris Opéra in 1915, in Vincent d'Indy's "Le Chant de la cloche", and continued to sing there for nearly 30 years. In addition to standard French works, she also found success in the operas of Christoph Willibald Gluck and Richard Strauss, singing the first French performances of "Elektra" in 1932. She also created roles for d'Indy, Darius Milhaud, and Henri Sauguet ("La chartreuse de Parme") and sang the title role in the 1935 revival of "Ariane et Barbe-bleue" by Dukas.