Before he received his first record deal, he was a waiter and a model.[4] He has been represented by Tune Models in Cologne. During the fashion week for the spring/summer 2016 season, he walked as an exclusive for Versace menswear.[5]
Weiss's first solo single "Regenbogen" was released the same year but failed to chart. In 2016, he released the single "Musik sein", which was a success in the German-speaking part of Europe, becoming a top ten hit in Austria and Switzerland. Follow-up "Feuerwerk", released in 2017, entered the top thirty in Germany and Switzerland and preceded his first studio album Irgendwas gegen die Stille, released in April 2017. A commercial success, it peaked at number three in Germany and at number four in Switzerland, eventually going platinum in both countries.[6] A reissue of the album was released later that year.[3] In May 2017, Weiss served as a member of Germany's jury at the 62nd Eurovision Song Contest in Kyiv, Ukraine.[3] In November, he was awarded the MTV Europe Music Award for Best German Act.[3]
2018–present: Irgendwie anders
In April 2018, Weiss won the Echo Award in the National Newcomer category.[7] He was also nominated for National Pop Artist.[7] The same month, he released his single "An Wunder," the lead single from his second album Irgendwie anders. It reached the top 20 of the German Singles Chart and gained gold status in Germany.[8] Also that year, Weiss voiced the titular character in a German animated fantasy family film Tabaluga, based on the media franchise of the same name created by musician Peter Maffay.[7]Irgendwie anders was released in March 2019 and peaked at number two in Germany and Switzerland.[8][9] As with "An Wunder," it was certified gold by the BVMI and produced five further singles, including "Hier mit dir."[6] The same year, Weiss participated in the sixth season of the German reality television show Sing meinen Song – Das Tauschkonzert, the German adaptation of The Best Singers franchise.[10] In 2020, Weiss released the previously unreleased single "Sag so," a collaboration with Achtabahn.[11]
Since 2021, Weiss has been featured as a coach on The Voice Kids Germany. In 2024, at the conclusion of his fourth season, Jakob Hebgen, a member of Weiss' team, won the season making Weiss the winning coach.