Job interview in Amsterdam

I live in the U.S. and have been approached by a company in Amsterdam. I've had a phone interview which went well, and they're asking me for possible dates to fly me out for the in-person interview.

I've never been to Amsterdam, but all my friends who have rave about it.

Anyway, a couple of questions:

1. The job is a software engineering position. My salary will probably be in the €50,000 to €60,000 range. I understand the tax rate to be 42%. However, at easyexpat.com I came across this:

Expats can expect a tax relief in the form of the 30 Percent Ruling. This is a personal income tax reduction for specialized foreign employees whose skills are scarce in the Dutch marketplace.

The 30 Percent Ruling compensates employees for the extra costs of their temporary stay in the Netherlands. It allows an employer to pay an employee a tax-free allowance of up to 30 percent of the employee's total remuneration (the "Basis") for the first 10 years of their stay in the Netherlands.

I don't know if my job qualifies for this. But if they are looking to hire from outside the Netherlands, I suspect it might.

2. Do I still have to pay U.S. federal taxes? Or is there a double-tax treaty between the U.S. and the Netherlands?

Thank you very much.