I have an invitation letter and working contract...

We would like to inform you that Procedures for obtaining a residence permit shall be made after obtaining a work permit from the Ministry of Human Resources and Emiratisation, which entitles the holder to enter the UAE for the purpose of work then the sponsoring facility will arrange for the worker to obtain a residence permit within a period of 60 days, which includes a medical examination, a resident's identity card, a work card and a residence visa stamp on his passport, which indicates that the worker resides in the UAE by sponsoring the establishment

To obtain a work visa in Malta, you must obtain a work contract, and then go to the Embassy of Malta in the country where you reside, and apply for a visa,
The application shall be accompanied by the following documents:
1) Copy of a valid passport for at least six months 
2) Two photographs with the same specifications of passport photo with white background for each
3) booking flight
4) Copy of the contract of employment or letter of employment

Thank you for contacting us, we are always at your service