Learn English – Is “How did your job go?” grammatically correct

When we ask, "How did {something} go?" the "something" must have finished. It cannot be ongoing. The simple past did go is used with things that happened in the past.

If the surgeon is operating on one of the organs of your body, and you are lying unconscious on the operating table, the nurse does not ask, "Doctor, how did the operation go?" because the surgical procedure is not finished yet. The nurse can ask "How is the operation going?"

But if the "job" is a completed task then your question is valid. Let's say the job was replacing the roof of a house, which people in that trade call "a job".

We have a big job tomorrow. We have to replace the roof of an old mansion.

Then you can ask:

How did your job go? Were there any surprises? Did the decking need to be replaced?

But if you're asking someone at dinner how they fared at work:

How did your day go?

There, your day means "your work day". The work day is over. It is evening now.