If you are unable to secure employment within the validity of your Portugal Job Seeker Visa, including the optional 60-day extension, you must leave the country once the visa expires. Remaining in Portugal without valid status may affect future visa applications. However, if you receive a job offer within the visa period, you can transition to a residence permit for work, which allows you to stay legally. Applicants are encouraged to prepare thoroughly before arrival, research industries in demand, and maximize the time given for job hunting.