SethBling said that his work at Xbox had not been related to video games, and that he had worked on the Xbox version of Internet Explorer, and on Xbox SmartGlass, a mobile phone app for remotely controlling an Xbox console. SethBling worked as a software engineer at Microsoft for three years, where he worked on Xbox, and for four months on Bing. SethBling wrote in 2012 that C# was his favorite programming language. SethBling started out programming his calculator in middle school and wrote 'lots of' games throughout high school, including an MUD. SethBling's nickname is derived from his AIM screen name in high school. He decided that he was an atheist sometime around when he was in elementary school, but 'played along' through high school. SethBling was raised Jewish, but has since become an atheist. In 2017, Cooper Harasyn and SethBling created a jailbreak by hand using exploits to save a hex editor onto a read-only memory cartridge, allowing for creation of mods. He was the first to perform this kind of arbitrary code execution by hand. He injected code to play a Flappy Bird-like game within Super Mario World on a stock Super Nintendo Entertainment System. In 2015, he was the first to do so on a home video game console. He achieved the world record for Super Mario World by using a glitch that enabled him to execute arbitrary code and skip to the game's credits. He held a world record of 41.35 seconds for Super Mario World until June 2020, and a former world record for The Legend of Zelda: Breath of the Wild.

SethBling wrote artificial intelligence programs that play Super Mario World, Super Mario Bros. In addition to Minecraft builds that run without mods, he created plugins for the game. He created an interpreter for the programming language BASIC and an emulator for the 1977 home video game console Atari 2600 in Minecraft.

He created original and derivative video games, devices and phenomena in Minecraft, without using Minecraft mods. SethBling (born April 3, 1987) is an American video game commentator and Twitch video game live streamer known for YouTube videos focused around the 1990 side-scrolling platform video game Super Mario World and the 2011 sandbox video game Minecraft.

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