The D3 visa is a work visa for highly qualified individuals who already have a job offer or work contract from a Portuguese company that will be valid for at least 1 year. The permit must be renewed every 2 years, giving applicants the opportunity to apply for permanent Portuguese residency after 5 consecutive years on the visa. This is providing the applicants remain employed and with legally approved residence during this time. If you change employers while on a residence permit in Portugal, as long as you meet the requirements for the D3 Visa category with the new employer, you can continue to benefit from the D3 Visa. The D3 Visa is intendend for foreign citizens that work for Portuguese companies or institutions. For remote work, it is advised using the D7 Visa (Digital nomad workers). This visa is designed for financially independent individuals who can support themselves without working for Portuguese companies.
