Can I work in Bulgaria while studying on a student residence permit?

A student residence permit allows limited employment alongside your studies, generally up to 20 hours a week during term time, and you can also work during the official holidays of your institution.

The purpose of your stay remains study, so work must stay within these limits and not interfere with your enrolment. Note that the rules around exactly when a separate authorisation is needed can vary in practice, so check your specific situation with the university's international office and the Migration Directorate before taking a job.