What Is an ATS, and How Does It Actually Read Your Resume?

If you've applied for jobs online, your resume has almost certainly passed through an applicant tracking system, or ATS. There's a lot of folklore about what these systems do, so here's a plain explanation.

What an ATS does

An ATS is software that employers use to collect, organize, and track applications. In general, it does a few things:

• Receives your application and stores it in a database.
• Reads ("parses") your resume and sorts the details into fields such as name, past employers, titles, dates, and skills.
• Lets recruiters search and filter candidates, often by keyword, job title, or location.
• Tracks where each candidate is in the hiring process.

How an ATS is configured varies by company and by product. Some employers use filters or knockout questions, and others mostly use it as a searchable inbox. Don't assume one behavior applies everywhere.

Where parsing goes wrong

Parsers read text in order. They can stumble on layouts that look nice to a person but are hard for software:

• Tables and multiple columns, which can scramble the reading order.
• Text inside images, text boxes, or graphics, which may not be read at all.
• Contact details in headers or footers, which some systems skip.
• Unusual section names such as "My Journey" in place of "Experience."
• Scanned documents, which are images, not text.

What helps

• A simple, single-column layout.
• Standard headings: Summary, Experience, Education, Skills.
• Plain, common fonts and consistent date formats.
• A text-based file. If the posting says which format it wants (.docx or .pdf), follow it. A PDF exported from a word processor normally keeps real text, while a scan doesn't.
• Keywords from the posting, used where they honestly describe your experience, since recruiters often search this way.

Myths worth dropping

"An ATS automatically rejects most resumes." You'll often see a figure like 75% repeated online. We haven't found a reliable source for it, so don't plan your job search around it. What's much more certain is that a recruiter has to find your resume in a pile, which is why a clear layout and relevant wording matter.

"Stuff in lots of keywords." Pasting keywords you can't back up doesn't just look bad to a human reader. It sets you up for interview questions about things you haven't done.

"White text hidden on the page beats the system." Don't do it. It's easy to spot, and it can get you removed from consideration.

The practical takeaway

Write for a person first, and make sure software can read it too. Keep the layout simple, use the posting's wording where it's true, and put your most relevant experience where a skim will find it.