Quick answer: Most ATS problems come from complex design, missing keywords, and weak achievement bullets.
Mistake 1: Design over readability
Complex layouts can break parsing. Use a simple layout so systems can read each section correctly.
Mistake 2: Generic bullets without outcomes
Generic bullets are easy to skip. Replace "responsible for" with action + number + result.
Mistake 3: Missing job-specific keywords
If key skills from the job post are missing, your resume may rank lower even when you are qualified.
Mistake 4: Keyword stuffing
Repeating keywords without context hurts readability. Use keywords only where your real experience supports them.
Mistake 5: No final validation
Always run one final check. Use the ATS checker and review the resume checklist before applying.