Residence permit in Slovakia on the grounds of labour activity can be granted to any foreigner, but — due to 14% unemployment — not in all spheres.
A work permit will be issued by the Agency for employment, social affairs and family under the labour contract and other additional documents.
Residence permit in the EU on the grounds of work can be granted for an estimated period of employment, but not more than for 2 years. Residence permit in Europe on the grounds of work is granted based on the permit issued by the Agency for employment. The latter can be obtained by concluding a contract with an employer (who must have permission from the Ministry of Labour; an application can “hang” at the job centre for minimum 45 days). You must stick to the procedure and cannot do this the other way around. Theoretically, a residence permit on the grounds of work will be granted for a previously defined work at a particular employer. The insurance, obtained after the residence permit, is paid by the employer.