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 year 281,474,976,712,644 AD of a parallel universe. In April 2013, Persson announced that the game was shelved, due to a creative block. In August of that year, he claimed that the game was indefinitely postponed, with the incentive that other Mojang staff members could continue its production should they desire. In September 2012, Mojang began the "Block by Block" charity project in cooperation with UN-Habitat to create and design real-world environments in "Minecraft". The project allows young people who live in those environments to participate in designing the changes they would like to see and involve them in urban planning.