Nothing special. You don't have any foreign earned income. All of your income was earned by working in the U.S. The fact you worked for a foreign company doesn't matter.
But more than likely you were not paid as an employee of that company. Instead you were hired as a contractor to provide product or services to that company. Therefore the IRS would consider that income to be self-employment income that gets reported on SCH C as a part of your personal 1040 tax return.
