He has contributed greatly to the development of the National Archives of Algeria (Archives Nationales d'Algerie) and the preservation and dissemination of Algerian history.
He published several works on the history of Algeria and the archival profession in Arabic and French.
Badjadja attended the University of Constantine, Algeria where he studied history and geography.
He currently serves as the Consulting Archivist at the Information and Research Center, at the Presidency in Abu Dhabi, United Arab Emirates.
[1] From November 1986 to March 1987, he was placed under town arrest restrictions but no official reasons were ever given.