Are non-competes enforceable across country borders? Example: I get hired by Google in Switzerland, quit, then go to work for Amazon in Canada. Is the non-compe

Are non-competes enforceable across country borders? Example: I get hired by Google in Switzerland, quit, then go to work for Amazon in Canada. Is the non-compete I signed in Switzerland enforceable in Canada? What about across USA<->Canada? Or across EU member states?