The situation in Canada is that you cannot legally call yourself an "Engineer" unless you have a P.Eng license. While you do not need an engineering degree to undertake this, if you don't have one you will have to ask the licensing body to adjudicate on "equivalent experience" - not sure what happens if they don't agree but I expect you'd have to take some courses. The licensing itself requires at least a professional practice exam (and possibly technical ones) and work experience overseen by a P.Eng. Software developers can take this certification but it is not particularly useful to their career except in narrow circumstances.