Start here: what this board is for
ENEnglishThis board is for work — permits, job hunting, contracts, and pay.
Before you post, the single most useful thing you can include is your visa. What you are allowed to do depends far more on your status than on the job itself, and a lot of confusion here comes from advice given without knowing it. Some visas allow only one employer. Some require permission before you take extra work. Some do not permit paid work at all.
Also worth including: your field, your language ability in Korean and English, and whether you need the employer to sponsor a change of status.
Two things worth knowing generally:
Get the contract in writing before you start, and keep your own copy. Verbal agreements are common and they are exactly what falls apart when there is a dispute.
Working outside what your visa permits puts your stay at risk, not just your job. If an offer requires you to do that, it is worth asking here first.
If you are on a working holiday visa, the Working Holiday board is a better fit — the rules there are their own thing.