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