The main difference between developed and developing countries is that developed nations are more industrialised and more over per capita income is higher in developed countries. Secondly Human development index is less in developing countries.
No wonder the unemployment rate in developed countries is very small because you can easily get a job there, because there are many small or large industries that need employees, while in developing countries, industry is still very limited many unemployed and daily income is very small
Not only that, in a developed country if you lose your job it is relatively easy to find a new one that pays you an amount of money that was close to your previous job, but losing your job in a country that is still developing can be a disaster for a family, if you want to find a job relatively soon you will have to accept less money but if you wait for the right opportunity you will probably be unemployed for months.