part-time jobs Korea company closed Korea visa expat career Korea foreign worker job change jobs in Korea for foreigners employer no response Korea XpatJobs foreign worker resignation notice period korea work visa korea quitting job Korea foreigner foreigner jobs Seoul employer shutdown foreign worker Korea job termination Korea foreigner Korea job search guide unpaid salary Korea foreigner work in South Korea 2025 freelance jobs Korea resigning job korea work visa korea rules English jobs Korea teaching jobs Korea JobKorea Saramin KOTRA job fair fired in Korea visa korea employment visa non-teaching jobs Korea visa sponsorship Korea work visa status Seoul Global Center LinkedIn Korea foreign worker ghosted Korea change job korea visa Korea job platforms Kowork