A work visa is a document that allows you to legally work in a country of which you are not a citizen. In the absence of such a visa, it is impossible to get a job in Europe, this is a violation of the law and is punishable by deportation and a ban on entry for several years.
Work visa in Schengen countries
Strictly speaking, a work visa in the Schengen countries is not a Schengen visa. This is a national visa, according to which you can stay for a certain time in the territory of the country where you applied for a visa, but not in all others. Of course, you won't be able to check exactly where you were. Still, it is not recommended to obtain a visa from one country, and get a job in another.
For each of the Schengen countries, obtaining a work visa involves its own characteristics, but the general rule for all is that you first need to ensure that the workplace is already waiting for you in the desired country. Without papers proving this, a visa is not issued to Russian citizens.
Exceptions are possible, for example, some agencies offer a work visa without real employment. Before you agree to such an adventure, find out what are the laws of the country where you are going. Sometimes such visas are made illegally using fraudulent means. And then you may have problems in the country where you are going to work.
Job search for visa in Europe
Obtaining a work visa itself is not difficult, the main problem is finding a job in Europe. Before getting a work visa, you should definitely find a job in the country of your choice. This can be done in several ways. First, you can try to find yourself a suitable job on the Internet. If you are a highly qualified specialist (for example, engineers are highly valued in the Schengen countries), then you just have to convince the foreign employer that you are the best candidate.
Secondly, since it is not always easy to get a job on the Internet, some pre-receive a tourist visa, trying to get a job with it. Once the agreement is reached, the person goes home and makes a national work visa, already having contact with the employer.
Another option is to look for a job if you already have a national visa. This is possible if, for example, you are studying in one of the Schengen countries and have the right to stay in the country legally. Not all student visas allow you to work, but looking for work while staying in the country on them is not prohibited.
Also, sometimes you can get a visa specifically for looking for a job. Not all, but some countries issue such. This issue should be clarified separately at the consulate of the state where you want to go.
Registration of a work visa
Usually a work visa in Schengen countries is issued for a period of one year. In the future, it is extended or reissued into a residence permit, depending on the rules of a particular country.
For registration, you need to provide an invitation from the employer to work or show the concluded contact, in any case you need the original document. Also, the employer can write an application to the local immigration authorities, which will issue you a permit to stay in the country. As with a tourist visa, you will need an application form, a passport, a photograph, and insurance. Two more documents that may be required: a certificate stating that you have no criminal record, and a medical certificate that you have no certain diseases.