AI & Technology
What Is ATS and How Does It Work?
Over 98% of Fortune 500 companies use an Applicant Tracking System to filter resumes before a human ever reads them. Here's exactly how ATS works and how to make sure yours gets through.
Over 98% of Fortune 500 companies use an Applicant Tracking System to filter resumes before a human ever reads them. Here's exactly how ATS works and how to make sure yours gets through.
You spend two hours tailoring your resume, hit submit, and hear nothing. It happens constantly — and most of the time, your resume never even reached a person. It was filtered out by software.
That software is called an Applicant Tracking System, or ATS. Understanding how it works is one of the highest-leverage things you can do as a job seeker.
An Applicant Tracking System is software that employers use to receive, sort, and manage job applications. Think of it as a database with a filter layer on top. When you apply online, your resume goes into the ATS first — not into a recruiter's inbox.
The ATS parses your resume (extracts the text and data), stores it, and scores or ranks it based on how well it matches the job requirements. Recruiters then search or filter this database to find candidates worth reviewing.
The ATS reads your resume file and tries to extract structured data: your name, contact info, work history, education, and skills. This is where formatting problems cause the most damage — graphics, tables, headers/footers, and text boxes often get scrambled or ignored entirely.
The ATS compares the text of your resume against the job description. It looks for specific keywords — skills, job titles, tools, certifications — that the employer flagged as important. Missing keywords = lower score, regardless of your actual qualifications.
Based on the keyword match and other factors (years of experience, education level, location), the ATS assigns your application a score. High scores float to the top of the recruiter's queue. Low scores get buried — or auto-rejected.
A recruiter sees the ranked list and typically reviews the top candidates first. In competitive roles, they may never scroll past the first page of results. Your goal is to be in that top tier.
| Factor | What ATS Checks | Impact |
|---|---|---|
| Keywords | Do your skills and titles match the job description? | Very High |
| Job titles | Does your past title align with the role? | High |
| Formatting | Can the parser extract your text cleanly? | High |
| Education | Degree level and field match? | Medium |
| Years of experience | Do you meet minimum requirements? | Medium |
| Location | Are you local or open to relocation? | Low–Medium |
Tables, columns, text boxes, graphics, and custom fonts confuse ATS parsers. Your resume text ends up scrambled or lost entirely. Use a clean, single-column layout with standard fonts.
If the job says "Salesforce" and your resume says "CRM software," the ATS may not connect the two. Use the exact language from the posting wherever accurate and honest.
Many ATS systems can't read text inside the document's header section. Put your name, email, phone, and LinkedIn in the main body of the document instead.
Infographic resumes look great to humans but are invisible to ATS. Never use images to represent skills, timelines, or experience — use plain text.
Some ATS systems handle PDFs well; others don't. When in doubt, submit as a .docx file unless the job posting specifies otherwise.
Here's the practical checklist:
No — and this is important. Keyword stuffing (loading your resume with every word from the job description, regardless of context) is easy to detect and will hurt you in the human review stage, even if it improves your ATS score.
The goal is to use relevant keywords naturally within your actual experience. If you managed social media ads, say "managed paid social campaigns on Facebook and Instagram" — not just "social media, Facebook, Instagram, paid ads, campaigns" in a wall of text.
Almost all mid-size and large employers. The most common platforms include Workday, Greenhouse, Lever, iCIMS, Taleo (Oracle), BambooHR, and SmartRecruiters. Each has its own quirks, but the core keyword and formatting principles apply to all of them.
Smaller companies and startups may review resumes manually — but even then, a clean, keyword-rich resume will make a better first impression.
Get Resumatch scans your resume against any job description and gives you an ATS score, identifies missing keywords, and shows you exactly what to fix.
Try It Free