Jens Bergensten (née Thornell). Jens Bergensten Jens "Jeb" Bergensten is a Swedish video game designer. Since December 2010, he has worked for the video game developer Mojang as a programmer and game designer. He became the lead designer and lead developer of the indie sandbox game "Minecraft", after Markus "Notch" Persson stepped down from his position in December 2011. He is known by his in-game name "jeb_". Bergensten started programming his first games at age 11 using BASIC and Turbo Pascal. By age 21, he was a mapper and modder for the first-person shooter "Quake III Arena". Later he worked as a
Markus Persson adventure game. Professionally he had worked as a game developer for King for over four years, until 2009. Afterwards he worked as a programmer for Jalbum. He is also one of the founders of "Wurm Online", though he no longer works on it. Outside of work, he has made seven games for competitions. He is the central figure of "", a documentary by 2 Player Productions about the rise of "Minecraft" and Mojang. Persson is a member of the Swedish chapter of Mensa. On 13 August 2011, he married Elin Zetterstrand. On 15 August 2012, he announced that he was