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Guide · 9 min read

ATS Resume Optimization Guide: Beat the Resume Checker

Most resumes are filtered out before a human ever sees them. Here's how Applicant Tracking Systems actually work, what an ATS resume checker scores, and the fixes that make your resume ATS friendly without making it boring.

What is an ATS (Applicant Tracking System)?

An Applicant Tracking System is software employers use to receive, parse, and rank job applications. When you upload a resume to a company portal — Workday, Greenhouse, Lever, iCIMS, Taleo — the ATS extracts your text, maps it into structured fields (name, work history, skills, education), and scores it against the job description before any recruiter sees it.

That's why an ATS resume isn't a style — it's a parsing contract. If the system can't read your sections, your application gets buried even when you're qualified.

How an ATS resume checker scores you

  • Keyword match — overlap between your resume text and the job description.
  • Section parsing — can it find Experience, Education, Skills with clear headings?
  • Job title alignment — your past titles vs. the target title family.
  • Years of experience — inferred from your dated roles.
  • Required skills — hard skills, tools, certifications named in the posting.

12 fixes for an ATS friendly resume

  1. Save and submit as .pdf or .docx — never .pages, .rtf, or an image.
  2. Use a single-column layout. Two-column resumes break parsers.
  3. Standard section headings: Experience, Education, Skills, Certifications.
  4. Spell out acronyms once: "Search Engine Optimization (SEO)".
  5. Mirror the job description's exact phrasing for hard skills.
  6. Use a clear date format on every role: Mar 2022 – Present.
  7. Keep job titles recognizable. Add a "/" alias if your internal title is unusual.
  8. No text inside images, headers, footers, or text boxes — parsers skip them.
  9. One font, sizes 10–12pt for body. Avoid icon fonts for bullets.
  10. Quantify outcomes (%, $, count) — humans skim for these after the ATS passes.
  11. Include a short Skills section listing tools and certifications by name.
  12. Run it through an ATS resume checker before every submission.

Common ATS resume mistakes

Tables and columns

Multi-column layouts and tables get scrambled — your bullet points end up jumbled with your skills list.

Graphics and icons

Skill bars, rating dots, and icons turn into garbage characters or get dropped entirely.

Creative section names

'Where I've made impact' won't be recognized as Experience. Use the standard heading.

Keyword stuffing

Hidden white text or repeated keywords get your resume flagged. Match phrasing naturally, in context.

How RELAY's Resume Analyzer helps

RELAY's Resume Analyzer is an ATS resume checker built into your sprint. It scores parse quality, keyword match against your target role, section structure, and quantified-impact density — then tells you exactly what to fix. TheResume Builder generates an ATS friendly resume from scratch, tuned to your career path.

Ready to test your resume?

Upload your current resume and get an ATS score, keyword gap analysis, and rewrite suggestions in under a minute.

Run the ATS resume checker