Is it permissible to work in a restaurant that serves both halal and haram foods, knowing that my work sometimes requires me to carry the prohibited items?

It is not permissible to cooperate with the restaurant owner in bringing forbidden things, and one must leave the job and search for another if necessary, along with repenting for what was earned from unlawful money and disposing of what remains of it in charitable ways. If the work is not connected to abominations, it is better to leave it to avoid being in places of abomination, forbidden mixing, and the inability to perform religious rituals.