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Getting a visa is a major hurdle indeed. Do not attempt this without professional help, the slightest formal error can cause your application to be rejected and require resubmission (which means paying the submission fee again).

If you're serious about this, I'd recommend getting your ass over here on some of the 6 month visa waiver programme (no work permitted) making contacts and attending interviews. Stick to large multinationals, small companies/startups will be hesitant to sponsor you due to high cost and long waiting periods.