Ask HN: How to find startups hiring people from overseas?

I have always thought I was a good programmer. I was the best in my school, I started studying algebraic topology at 19, I have 5 years professional experience in some deep low-level stuff (media encoding primarily). I have even been invited to Google Zurich once. I was wrong, I am just an average one. I am just a "gloomy" Russian with some strange degree. I have been dreamed of leaving my country for years, and as I imagine, there are two major ways to do so: to get a job offer from a huge company (e.g. Amazon) or from a startup. Huge companies do not mind all the work permit procedures, they pay a lot, but they also demand a lot, and I am honestly not good enough for them yet. Mid-sized companies do not usually bother themselves with foreign employees at all. But some small companies do indeed. How can one find such employers who cannot afford to pay a lot, but who can hire people from overseas? Or even sponsor a Greed Card a few years later if we are talking about the U.S. I do not care about the money. I just need to be relocated, I cannot stand this anymore.