Questions & Answers about Pekerjaan saya di kantor cukup mudah.
Both come from the same root kerja (work), but:
- kerja on its own is more like “work / to work” in a general sense, and can be a noun or part of a verb:
- Saya kerja di kantor. = I work at an office. (informal)
- pekerjaan is a noun formed with pe- … -an, meaning “job / occupation / task”:
- Pekerjaan saya di kantor… = My job at the office…
So in this sentence, pekerjaan is more natural than kerja because you’re talking about your job as a thing that you have, not the activity of working in general.
In Indonesian, possession is usually shown by putting the possessed noun first, followed by the possessor (often a pronoun):
- pekerjaan saya = my job
- rumah saya = my house
- teman saya = my friend
So the pattern is:
[thing] + [owner]
Saying saya pekerjaan would sound wrong in Indonesian; it would be like saying “I job” in English. The pronoun saya cannot stand in front of the noun to mean “my” the way my does in English.