Firstly, you need covering letter of the job you got job. In that covering letter, your employer will be mentioning and sponsoring you to work in his country at his workplace. Along with that you will be in need of other documents like:

1. Educational Documents
2. Medical Certificate
3. Passport
4. Passport Size Photographs

All these documents should be well attested from your home country govt. (MEA)  & Embassy of the country you are moving to work.  There are alot of MEA empanelled agency providing Visa Stamping Services. One of them I know is Superb Attestation. If you live in India, you can get attestation done from them. They have many branches in pan India.  When all of this work will be done you will get work visa very easily.