I want to preface this with something: the people who make these mistakes are not careless or lazy. They're often people who took real time on their resume, who genuinely want the job, and who are qualified for the role. They just haven't been told these specific things.
None of this is intuitive. Most of it isn't covered in school or standard career advice. So if you recognize yourself in any of these — you're in good company.
1. The two-column layout
It looks clean. It fits more on one page. Tools like Canva and most "modern" resume templates default to it. It's also one of the most reliable ways to get filtered out by ATS.
Applicant tracking systems read left to right across rows, not down columns. A two-column layout with your experience on the right and skills on the left gets read as a scrambled mix of both. Parsers mangle it. You lose points before a human sees anything.
Single-column only for submissions. If you want a designed version for networking or in-person use, keep that separately.
2. Describing responsibilities instead of achievements
"Responsible for managing the social media presence of the company." That's a job description. It tells me nothing about whether you did it well.
"Grew Instagram following from 4K to 22K in 8 months through a weekly video content strategy." Now I know something about you.
Every bullet point should start with an action verb and ideally end with a result. What did you do, and what happened because of it? Even approximate numbers are better than none. "Reduced" vs "reduced by ~30%" is a meaningful difference.
3. The skills section that says "Microsoft Office"
Listing "Microsoft Office", "communication", "teamwork", or "detail-oriented" in your skills section isn't hurting you exactly — but it's wasting space you could use for skills that actually differentiate you.
Every knowledge worker has Microsoft Office. No one is filtering for it. Use your skills section for tools, technologies, and methodologies specific to your field and to the role you're applying for.
4. No numbers anywhere on the page
Quantification is uncomfortable for a lot of people — it feels like you're overpromising or that you can't back it up in an interview. But vague bullets are even worse. They communicate nothing except that you held the role.
You don't need exact figures. Ranges, approximations, and percentages all work. "Managed a team of 3–5 engineers." "Reduced average handle time by roughly 20%." "Helped scale the newsletter to ~15,000 subscribers." Specific enough to be credible; honest enough to feel real.
5. Contact information in the document header
This one surprises people. Many put their name, phone, and email in a styled document header — visually at the top of the page, but technically in the header section of the file. Many ATS parsers skip document headers when extracting text.
Result: your contact information is invisible to the system, even though it looks fine on screen. Keep contact details in the body — in the actual text flow, not a header or footer section.
6. Using "responsible for" as your only verb
"Responsible for" is the most passive construction in resume writing. It describes a job duty, not an action. When every bullet starts with it, you sound like someone reading their own job description, not someone who made things happen.
Swap it for action verbs: led, built, reduced, launched, managed, increased, designed, drove, improved. The bullet becomes immediately stronger.
7. Submitting a PDF exported from design software
If you designed your resume in Canva, Adobe InDesign, or Figma and exported a PDF — there's a real chance that file contains images of text, not actual text. ATS systems can't extract any content from it at all.
The test: open the PDF and try to select individual words with your cursor. If you can't select the text, it's an image. Rebuild in Google Docs, Microsoft Word, or any text-based tool and export from there.
All seven of these mistakes are fixable in an afternoon. None of them require you to change your actual career history or inflate your experience. They're presentation issues — and presentation is learnable.
If you're not getting the callbacks you think you should be getting, start here. Your qualifications are yours. Don't let the formatting get in the way.