Applicant Tracking Systems (ATS) are the gatekeepers of modern hiring. Before a recruiter ever sees your resume, software like Workday, Greenhouse, or iCIMS parses it, scores it against the job description, and ranks you against hundreds of other applicants. If you score too low, you're filtered out — and no one will ever know you applied.
Studies show that 75% of resumes are rejected by ATS before a human reviews them. The good news: most rejections are caused by avoidable mistakes.
Mistake #1: Using Headers and Columns That ATS Can't Parse
Multi-column layouts look great in Word or Canva. But most ATS systems read left-to-right, top-to-bottom. When you place your contact info in a sidebar or split your experience into two columns, the ATS often reads them out of order — or misses them entirely.
- Avoid text boxes, tables, and columns for main content
- Keep your layout single-column with clear section headers
- Don't put critical info (phone, email, LinkedIn) in headers or footers — ATS often ignores these
- Use standard section titles: 'Work Experience' not 'Where I've Been'
Mistake #2: Submitting a PDF (When They Want a DOCX)
This one surprises people. PDF is the gold standard for human readers — it preserves formatting. But older ATS systems (especially Taleo) struggle to parse PDFs. Unless the job posting explicitly says PDF, submit a .docx file. If you're using Resuniq, we handle this automatically — you can export both formats with one click.
Mistake #3: Missing Keywords from the Job Description
ATS systems are essentially keyword matchers. They compare the words in your resume against the words in the job description. If the JD says 'cross-functional collaboration' and your resume says 'worked with different teams,' you might score zero for that requirement — even though you mean the same thing.
How to fix it
Paste the full job description into a JD tailoring tool and see exactly which keywords you're missing. Then naturally incorporate the language from the JD into your bullets and summary — don't stuff, integrate.
Mistake #4: Using Images, Icons, and Special Characters
That star-rating graphic for your skill level? The LinkedIn logo next to your URL? The fancy bullet points you copied from a template? All invisible to ATS. Worse, special characters (■, ★, →) often get parsed as garbage text, breaking the surrounding sentence.
- Use plain bullet points (•) or dashes
- No skill meters, progress bars, or rating graphics
- Spell out URLs instead of hiding them behind icons
- Avoid decorative lines made of repeated symbols like ═══
Mistake #5: Hiding Keywords in White Text
Some people try to game ATS by pasting white-text keywords at the bottom of their resume — invisible to humans, readable by machines. Don't do this. Modern ATS systems flag it. Recruiters catch it. And it will get you permanently blacklisted from a company. The only way to win is to genuinely earn the keywords through relevant experience.
The Quick ATS Checklist
- ✅ Single-column layout with standard section headings
- ✅ .docx format unless PDF is explicitly requested
- ✅ Keywords from the JD naturally integrated into your content
- ✅ No images, icons, text boxes, or special symbols
- ✅ Contact info in the body of the document, not a header/footer
- ✅ Dates in consistent format (Month YYYY or MM/YYYY)
- ✅ No white-text keyword stuffing
Fixing these five mistakes won't get you the job — but they'll make sure a human actually reads your resume. That's the goal of ATS optimization: get to the next round, then let your experience do the talking.