How many companies did you apply for? To get my current job, I applied for about 120 positions, interviewed with four of them. It's a competitive market, which means it's a numbers game. Don't give up after applying to a small handful of companies. Also, if you're near Mexico City, try spending some time at a well-connected coworking space like Centraal. If not, check out workfrom.co for coworking spaces near you and start spending time there and going to events. Jobs come easier through connections than through cold applications. Plus you'll probably find encouragement there too.

Also mexican. Not sure what visa you are trying to get. But if you just want to work in USA it is very easy to get a visa if you are Mexican and you have a relevant degree. Look at TN Visa. You just need an offer letter. 3 close friends have done that and the process was very simple.

https://travel.state.gov/content/visas/en/employment/nafta.h...

Where do you live? I would recommend looking at startups in GDL. Also, I wrote a longer reply in the main thread.

Ah I understand that - I've never had to get a Via (US Citizen),but someone will probably offer up advice here)