Question: My current job is as a delivery driver for a take away where they sell some food which is haram. Is there any sin on me for transporting these food items?
Answer: Yes it is haram to deliver such foods, because this is to help people doing sins. This is so even if the customers are non-muslims in non-muslim countries. What is haram for us is haram for them, however, they are not prevented from certain sins, such as eating pork or the like, if they are paying jiziah to the Kaalifah. This is despite this being sinful for them.
... and Allah knows best.