Is it better for the aforementioned student to work in a field outside his specialization for a good salary, or to travel abroad to complete his studies and work at the same time, given the fear of the temptation of being in a foreign land in both options?

Traveling to Western countries is fraught with dangers to one's religion and morals, and few are those who manage to preserve their faith there. For those who are compelled to travel, it is a prerequisite to possess knowledge and piety to guard against doubts and desires. It may also be necessary to bring one's wife along. Since you are single and fear temptation, you should not risk your religion.

Working in a coastal tourist area is better than traveling to infidel countries, provided that the work is permissible, away from sources of temptation, and does not involve assisting tourists in wrongdoing.

Committed Muslims in Western societies suffer greatly, and many of them regret coming there. However, we do not deny the existence of those who remain steadfast in their faith, and for some, traveling was a blessing.