The fastest option to get a right to work is to apply for temporary protection, as you can start working or studying as soon as you register your application with the police or border control authority. After registration, the police or border control authority will provide you with a certificate proving your right to work.
If you apply for an asylum, the decision on your application will take some time. It is recommendable to start looking for work in the meantime if you do not have confirmed employment yet. You can search vacancies on employment service websites, newspapers or social media, for example. Asylum applicants are allowed to find paid employment once three or six months have passed since they applied for asylum in Finland, depending on if they have presented a valid travel document.
Seasonal work certificate
If you apply for a seasonal work certificate, the next step is to wait for a decision on your application, which will take some time. You can then start working when you have received the certificate.
Keep in mind that according to the Finnish Immigration Service, they do not currently make negative decisions on applications by Ukrainians that would entail removal from Finland.