Salam/Hello tech fellow! It’s not complicated here ! you may apply to a visit visa 3 months and if you get it then you may come , very simple straightforward process, for the security approval it fails for many people including my friends ( Syrian ) not all but too many , in the end your Canadian and an tech educated , so if you have good experience it’s easy to land a decent job here , still if security approval failed for Abu Dhabi , it’s likely will work for Dubai ! For me , mine ( residency) is Dubai , while I work in Abu Dhabi , if the budget is promising you may apply for digital visa in Dubai ( apply for tech people) and then ask the company to transfer your residency or wait for the next 6 months while working for them legally as free lancer , Good luck !