I dont know how to start the intro here

I am (or my wife is) planning to apply for residence permit for her to come here and live with me.
I am neither a Finn nor an EU citizen. That means I have to show proof of stable income. I am making enough money to meet the income requirement set by the immigration office.
The question is does the type of work contract matter for the decision making process? I am working as a courier for WOLT (I might have dropped some delicious food for some of you


is there anyone out there who has used Wolt (or foodora) courier service for immigration process of any kind? Or anyone who has applied using " freelancer" income for immigration process? Or anyone who could advice me on this matter please help.
Thank you