Congratulations on receiving an invitation through the Arrima Expression of Interest!
Regarding your question, you will need to check the specific requirements provided by the Quebec government for your diploma and job experience documents. Typically, when submitting documents for immigration purposes, it is recommended that you provide certified true copies of your diploma and transcripts, along with a translation if the documents are not in French or English.
For job experience, a Certificate of Employment (COE) is an important document to provide. If the COE does not contain detailed job duties and responsibilities, you may need to provide additional evidence of your job experience, such as reference letters from your supervisors or colleagues, job contracts, pay stubs, or tax documents. These additional documents should provide a more comprehensive overview of your job duties and responsibilities.
It is always best to double-check the specific document requirements provided by the Quebec government, and if you have any questions or concerns, it may be helpful to consult with an immigration lawyer or a certified immigration consultant.