Don't use levrage against an imployer, it will most likely back fire on you, the employer will think mmm, this guy is not happy, so i will keep him for a while untill, i find a replacement then fire his ass in the nearest opportunity , if I was you i will go with the startup, build a portfolio website, and study data structures and algorithms at home, try websites like contra, toptal, flex jobs and others and work remotely, it will take time to Land a job and when you do, get an accountant and make a patent to be able to get paid from  other countries, at your level you can find a job in the range of 1500 to 2500-3000 usd a month with ease and even more, beleive in your self, youcan do it, and don't allow broke ass tunisian employers bully you, good luck