What is an ATS?
An Applicant Tracking System (ATS) is software that companies use to manage the flood of resumes they receive. When you apply through a careers page or job board, your resume almost always goes into an ATS first — not directly to a hiring manager.
The ATS does three things: parse your resume into structured data (name, email, work history, skills), score how well it matches the job description, and rank you against other candidates. Recruiters then review only the top-ranked applicants.
The major ATS platforms
You're most likely being filtered by one of these:
- Workday — used by ~50% of Fortune 500. Strong text-extraction parser.
- Greenhouse — popular with mid-stage tech startups. Good with LinkedIn imports.
- Taleo (Oracle) — older system used by enterprises. Notoriously strict on formatting.
- iCIMS — common in retail, healthcare, and large IT services.
- Lever — preferred by fast-growing startups.
- Naukri RMS — dominant ATS for Indian recruiters.
Why ATS rejects resumes
1. Unparseable formatting
Tables, text inside images, two-column layouts, headers and footers, and unusual fonts can cause the parser to extract garbage data — or skip your resume entirely. Stick to a single column, standard fonts (Arial, Calibri, Times New Roman, Helvetica), and avoid putting critical info in headers/footers.
2. Missing keywords
Most ATS systems do keyword matching against the job description. If the role asks for "Python, AWS, REST API design" and your resume says "scripting languages, cloud, microservices," you'll score low — even though you have the same skills. Mirror the terminology from the job description verbatim where it's accurate.
3. Wrong file format
PDF is safest with modern systems (Workday, Greenhouse, Lever). DOCX is sometimes preferred by older systems (Taleo). Never submit images, scans, or non-standard formats unless the system explicitly accepts them.
4. Missing standard sections
ATS parsers look for predictable section labels: Experience, Education, Skills, Projects. Creative labels like "Where I've Made an Impact" or "Things I'm Good At" confuse parsers. Use the standard names.
5. Date format inconsistency
Use MMM YYYY (e.g. "Jan 2023 – Mar 2025") for all roles. Mixing formats like "January 2023" then "03/25" causes parser errors that drop your work history.
What to do
- Use an ATS-tested template. Every Resume2Recruit template is tuned for 95%+ parse rate on the major systems above.
- Tailor for each application. Match keywords from the job description — don't reuse a single resume for 50 applications.
- Quantify achievements. "Increased conversion by 37%" beats "Improved conversion." Numbers survive parsing and impress recruiters.
- Test before submitting. Copy your resume content into a plain text editor. If sections come out scrambled, your resume will fail ATS too.
The bottom line
ATS isn't your enemy — it's just software trying to cope with hundreds of resumes per opening. Treat it like any other system: understand its rules, follow them, and you'll consistently land in front of human recruiters where your actual qualifications can do the work.
Keep reading
- 10 resume tips that actually move the needle — practical writing advice once you've got formatting sorted
- How to write a resume summary recruiters read — fix the one section recruiters glance at
- Help Center — FAQs about how Resume2Recruit's ATS scoring works