An ITIN Number job typically refers to employment or freelance work that can be performed using an Individual Taxpayer Identification Number (ITIN) instead of a Social Security Number (SSN). ITINs are issued by the IRS to individuals who need to file taxes but aren't eligible for an SSN, such as certain non-resident workers, independent contractors, or freelancers. While an ITIN allows individuals to pay taxes, it does not grant work authorization in the U.S. Employers must verify employment eligibility through proper documentation, and workers should ensure compliance with immigration and tax laws.