As far as I know, Bubble will import the unix format (date since 1970 in milliseconds) to a date, so converting it first shouldn’t be necessary. Once it is stored in the database as a date, it can be displayed in your own format and timezone.
I think to specify individual parts of the job, you might need to remove job as a parameter, and add the others, example “start_date” as date, “title” as text.
There are some samples from different people trying this in:
I suggest searching this forum for “endpoint”, this has been discussed before.