Born to a mostly poor family in Novigrad, Janek lead a mostly normal childhood, his upbringing remaining the same as any other until around middle school. Janek's older brother, Matyas, was a less than reputable member of society and spend most of his time doing drugs. Janek only wanted to spend time with and emulate one of his bigger role models in life, and so he matured quickly, falling in with the wrong crowd of people much older than him, including his brother. He smoked his first cigarette at 15, took MDMA at 17, and eventually developed schizophrenia at 19. He was medicated for it, but has not been able to keep up with frequent dosages recently.
Soon, he fell into the drug running business, and was often used as a mule for his gang, he never enjoyed the work he did, but he felt apart of something greater, something he never had before. He was not perfect either, he made frequent mistakes, or ditched a shipment out of paranoia that he would be arrested or killed, and was beaten for it, his abuse eventually leading to developing random outbursts of anger. He eventually went against his peers after they brought in someone new, a pharmacist, bound and gagged, they chained him to the floor and forced him to work, producing drugs for them to sell. When the infection hit, he took pity on the man, and set him free.
He and his now friend have been travelling together ever since, having stolen a car and driven it all the way out of Novigrad, where denser populations was bad news for disease, to Chernarus, to hopefully build a new life.