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
Mojang initiative started in October 2011, "Mina Kvarter" (My Block), which gave young people in Swedish communities a tool to visualize how they wanted to change their part of town. According to Manneh, the project was a helpful way to visualize urban planning ideas without necessarily having a training in architecture. By 2016, 300 of the areas UN-Habitat plans to remodel will be recreated in "Minecraft". ZeniMax Media, the parent company of Bethesda Softworks, filed a lawsuit against Mojang on 27 September 2011, claiming that Mojang's planned trademark of the title, "Scrolls", infringed upon Bethesda's trademark of "The Elder Scrolls" series.