In 1991, Fioretos earned his PhD in Comparative Literature with The Critical Moment, a deconstructivist analysis of works by Friedrich Hölderlin, Walter Benjamin, and Paul Celan.

Fioretos's contribution to Sweden's most popular radio show, Sommar ("Summer"), a series of self-portraits by Swedes famous and unknown, was aired on 16 July 2010.

[4] Comments on more recent works may be found in a long conversation with German literary critic Cornelia Jentzsch, entitled Den tredje handen (The Third Hand) and included in the box Grå kvartett (Gray Quartet), published in 2024.

Fioretos has received numerous grants and awards both in Sweden and abroad, including from The Getty Center for the History of Art and the Humanities,[5] the Swedish Academy, the Alexander von Humboldt-Stiftung, the DAAD Künstlerprogramm Berlin,[6] the Bank of Sweden Tercentenary Fund, the American Academy in Berlin,[7] and All Souls College, Oxford.

Fioretos has translated books by Paul Auster, Friedrich Hölderlin, Vladimir Nabokov, and Walter Serner, among others, into Swedish.