His theatrical text Egon was published by Passagen Verlag in 2008 and was presented in the form of a scenic reading and performance at the Leopold Museum in Vienna.
Weiss took part in the Ingeborg Bachmann Prize in 2009 with his text Blätterliebe. In 2010, his play Seifenblasenoper. Eine Kritik der runden Vernunft was presented at the Burgtheater Vienna. In 2011 he won the Hans Gratzer grant with his play Allerwelt, with a world premiere at the Schauspielhaus in Vienna, where he was the in-house author in the 2013/14 season.[3]
In January 2013 his story Tartaglia appeared in the Edition Atelier in Vienna.[4] From December 2013 to spring 2014, Projekttheater Vorarlberg put on a production of Weiss's Ein schöner Hase ist meistens der Einzellne, a play based on the real-life story of poet Ernst Herbeck (1920–1991) and artist August Walla (1936–2001), long-term schizophrenic artistic patients of the Gugging Mental Hospital near Vienna.[5]
In September 2018, Weiss published his critically acclaimed debut novel Am Weltenrand sitzen die Menschen at Suhrkamp Verlag (Berlin). The 1,056 pages were published as five volumes in a slipcase, but are a coherent novel.[6] The novel won the 2018 Literaturpreis der Jürgen Ponto-Stiftung [de][7] and Klaus-Michael Kühne-Preis [de][8] and 2019 Rauris Literature Prize awards.[9] In October 2019, his play Der letzte Mensch (The Last Man) premiered at Nestroyhof [de] Hamakom, which deals with the future of mankind in various scenarios.[10]
