Marcin Kosiński has a master degree in Mathematical Statistics and Data Analysis specialty and is working in the Research and Development Department at the biggest polish news web portal, wp.pl (Virtual Poland Group). Challenges seeker and big R package enthusiast. Currently working in the field of large-scale online learning and various approaches to personalized news article recommendation. Co-organizer of the +950 members R Enthusiasts meetups in Warsaw. Interested in R packages development and survival analysis models. He worked as a subject matter expert at +2000 members Data Crunchers Online R Course at The Warsaw School of Data Analysis.