Yes, you can apply for permanent residency in Portugal after working there. If you live and work in Portugal legally for 5 years, you can apply for permanent residency. During this time, you must have a valid residence permit, pay taxes, and follow the country’s rules. Once you get permanent residency, you can live, work, and travel freely in Portugal without needing a new visa every time. After becoming a permanent resident, you can also apply for Portuguese citizenship if you meet the other requirements.