non-teaching jobs Korea JobKorea job termination Korea foreigner visa reporting timing Korea LinkedIn Korea quitting job Korea foreigner work in South Korea 2025 English jobs Korea expat career Korea KOTRA job fair foreign worker job change korea foreign worker mistakes Korea employer no response Korea foreign worker side job korea Kowork foreign worker ghosted Korea Seoul Global Center foreigner jobs Seoul work visa status foreign worker unsafe work Korea Saramin change job korea visa foreign worker resignation labor office communication Korea notice period korea workplace change reporting Korea foreign worker fired in Korea visa e7 visa job change korea labor office foreign workers Korea freelance jobs Korea unpaid wages foreigner Korea Korea job search guide work visa korea jobs in Korea for foreigners company closed Korea visa XpatJobs korea employment visa employer shutdown foreign worker Korea unpaid salary Korea foreigner foreign worker job change foreign worker reporting delay Korea visa sponsorship Korea labor rights foreigners Korea resigning job korea Korea job platforms foreign employment law korea part-time jobs Korea visa violation part time korea work visa korea rules visa reporting deadline Korea teaching jobs Korea