If she is on a student visa, try to find out if she has the option to go on Optional Practical Training (OPT), the monetary commitment for an employee is minimal so I think many companies think this would be a good way to try out an employee before investing in their H1B process.

If the OPT option is not available to her for some reason, ask her to apply to a large company (Goog, FB, etc). Those guys have the resources to do an H1B without worrying too much aS long as the employee has crossed the interviews...