Aleksa is a pedagogue and a specialist in Internet technologies. He works at the Institute for the Improvement of Education of the Republic of Serbia (Zavod za unapređivanje obrazovanja i vaspitanja), within the Center for Professional Development of Education Personnel, as an advisor–coordinator.
He is engaged in the development and implementation of digital educational technologies, the preparation and delivery of national teacher training programs, as well as in the application and development of artificial intelligence in education.