There are a dozen kinds of visas available. Make sure you know the difference and which type of visa you need. A tourist visa will not permit you to work in another country legally. Every country has a different process for granting a WORK VISA to nationals of Pakistan. Please take your time to review the information on the destination country’s Embassy visa application website, together with the most frequently asked questions.
Remember that it is important to enter the destination country with a visa that accurately represents the purpose of your stay.