Jakob was born the bastard Son of a Chernarussian Mother and Father. He was raises in the Capital of Novigrad, both parents were born into wealth so he never needed to worry about money. His misspent youth brought him into a life of crime, eventually turning to drug dealing/taking. It didn't take long for him to get involved in organised crime, as he began to sell drugs for various businesses that used their store as a front for drug dealing. His obvious addiction to amphetamines became his downfall as he was incarcerated for intent to supply. But once out of prison he began to fall back onto his old habits, and started selling for the Bílek Family. One of his cellmates happened to work for them and put in a good word for Jakob. Once he was realised from prison he began selling for one of the clubs the family uses as a front, cutting them in on the profit he made.
After a while of doing this he was invited to become a real member of the family and not just an associate. He would take his new found power and knowledge and pushed for the idea of selling to tourists. This venture would become lucrative but dangerous. At this point Jakob had several other dealer working under him as he would still supply to his own customers, but would hear of his men getting busted. Soon he would realise that undercover cops were the ones trying to take down the dealers, specifically the ones selling to the various tourists of the capital. At this point Jakob would lose control of his dealers and had to go back to working the club. At this point he had lost a lost a lot of the respected he gained from his businesses dealings, and was considered a failure to most of the Bílek Family as well as their associates.
While he was back working at the old club again his half-sister cam into his life. His Dad called him asking to keep her occupied while he had errands to attends to run. Once they met it didn't take long for her to get involved in Jakob shady lifestyle. She began to help push drugs onto the clientele and sell to the odd person or two. It didn't take long for the club owner to accept her as one of his associates, and she began to work with Jakob to sell to not just people in the club, but pushing back into selling drugs to tourists again. Things went a lot better the second time around and he began to gain a bit more respect from his fellow gangsters again.
Soon after he was given a chance to prove himself to one of the Family under-bosses Tibor, by helping the group getting sent out to find the man's daughter. This is what took him and his Sister to South Zagoria just as the outbreak happened. Now he's just trying his best to keep him and his sister alive, as well as keeping in good standing with the rest of the Bílek Family who are in the same situation.