This is the 313th most frequent Swedish word.
jobba
To work.
The word 'jobbar' is the present tense conjugation of 'jobba', used to indicate a regular profession-related task.
Jag jobbar på kontoret varje dag.
I work at the office every day.
In this context, 'jobbar på' indicates making efforts towards enhancing a personal skill or aspect.
Vi jobbar på att förbättra våra språkkunskaper.
We are working on improving our language skills.
Here 'jobba' is used in its infinitive form following a modal verb, showing effort towards a goal.