In most cases, you cannot continue working once you have officially completed your program. Completion is confirmed by:
- Your official letter of program completion,
- Your final transcript, or
- An email from your institution confirming that you have finished your studies.
You may only continue working after completing your studies if:
You are enrolling in a new study program.
You have applied for a work permit before your study permit expires.
IRCC link: https://www.ircc.canada.ca/english/helpcentre/answer.asp?qnum=1472&top=15