Editor-in-chief of the Polish edition of Playboy from 2003 to 2012. For many years, he wrote columns for Wprost and Newsweek. Between 2000 and 2002, he hosted the reality show The Mole (Agent) on TVN. From 2005 to 2008 and again from 2013 to 2019, he co-hosted Dzień Dobry TVN—first with Kinga Rusin, later with Magda Mołek. From 2009 to 2022, he hosted Drugie Śniadanie Mistrzów on TVN24; in 2023, he launched Drugie Śniadanie Mellera on his own YouTube channel, and in 2024, Trzecie Śniadanie and Kolacja Mellera on Channel Zero. Since early 2023, he has also hosted Mellina on Eska Rock. He made his literary debut in 2011 with Gaumardżos! Stories from Georgia, co-written with his wife Anna Dziewit-Meller, which became a major bestseller. In 2013, he published a collection of reportage, Między wariatami. Opowieści terenowo-przygodowe, followed by essay collections Sprzedawca arbuzów (2016), Nietoperz i suszone cytryny (2019), and Trzy puszki bobu (2023). In 2022, he published his debut action-adventure novel Czerwona ziemia, which quickly became a bestseller. His latest adventure novel, Dzieci lwa, was released in 2024.