The most natural is neither. If you are looking where to find a good job, here is a good place.
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Anonymous"If you are looking where to find a good job, here is a good place for it/that".It or that at the end of that sentence?"looking where" doesn't work. The following are more idiomatic.
Anonymoususage of "it" and "that"Nine times out of ten (or even more often) you'll want "it".