What is an Applicant Tracking System (ATS)?
An Applicant Tracking System (ATS) is the software recruiters use to screen resumes before a human reviewer ever sees them. Most online job postings — and nearly every Fortune 500 employer — route applications through platforms like Workday, Greenhouse, Lever, iCIMS, and Taleo. These systems parse your resume into structured fields, score the result against the job description, and surface only the top matches to the recruiter. If your resume can't be parsed cleanly, or if it doesn't include the right keywords, you're filtered out before anyone reads it.