Yes, you can change employers in Hungary after getting your work visa, provided you get a new job offer from a Hungarian employer who can support your new work visa application. The new employer will file for a new work permit, which may take 30 to 90 days to be approved. After approval, you must update your residence permit. You cannot switch employers in Hungary without proper authorization, as most work permits in Hungary are employer-specific and require being issued by a specific employer.