Resume mistakes that disqualify candidates (and how to fix them)
Sending your resume and not getting a response is rarely about a lack of qualifications. Most of the time it’s a formatting or focus error that causes the document to be discarded before a person evaluates your experience. The good news: almost all of these mistakes are simple to fix once you know where to look.
By Carlos Jacon · Founder of CareersForge · Senior Engineering Manager
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Why are so many resumes discarded in seconds?
There are two filters before a human sees you. First the ATS (Applicant Tracking System), software that reads the resume and measures the match to the job description. Then the recruiter, who usually decides in less than ten seconds whether to keep reading. An error in either filter ends the application. A large share of resumes never reach a person, blocked by the automated filter or by application volume, and those that do receive very little attention: an eye-tracking study by Ladders (2018) measured an average of about 7 seconds of reading per resume in the initial screening.
Understanding that there are these two readers changes how you write: the document needs to be machine-readable and convincing to a person at the same time.
Which mistakes make the ATS discard your resume?
These errors aren’t about your experience, but about formatting that prevents automatic reading.
- Multi-column layout, tables, text boxes, or a header inside an image that the parser can’t read.
- Missing the job’s keywords (tools, skills, job title) that the ATS is looking for.
- Text embedded in an image or logos instead of real text.
- Using the same resume for different jobs, producing low keyword match.
Which mistakes make the recruiter lose interest?
You passed the ATS, but there are still traps that cost the reader’s attention.
- A generic objective like 'seeking new challenges' that doesn’t state the desired role.
- Describing only job duties, without the impact or results you produced.
- Typos and grammar errors, which undermine credibility on the spot.
- Outdated contact info (phone, email) or irrelevant personal details taking up space.
Example: generic objective becomes a focused summary
Before: Objective: seeking new challenges in an innovative company where I can grow.
After: Data analyst with 5 years in e-commerce. I turn data into decisions and want to work in BI to reduce reporting time and support the commercial team.
How to fix the most common errors
Fixing them is straightforward and fits into a careful review before each submission.
- Use a single-column layout, no tables or images, in a simple file.
- Swap 'tasks' for 'results': instead of 'responsible for X', write what changed because of your work.
- Distribute the job’s keywords naturally in the summary and experience sections.
- Check contact details and remove anything that’s not relevant to the role.
The costliest mistake: a generic resume
The most expensive mistake is sending the same resume to every job: because both filters compare your document to each description, the generic one always loses to someone who adapted theirs. Since this is so decisive, there’s a dedicated guide on how to customize the summary and emphasis per job without rewriting everything (see 'Continue on your journey' at the end of this page).
Frequently asked questions
Should I put a photo on my resume?
In most cases, no. A photo can take up useful space, interfere with ATS reading, and introduce bias. There are sector exceptions, but the general rule is to prioritize relevant textual content.
What is the ideal resume length?
For most careers, one to two pages. The important thing isn’t length but relevance: every line should help the reader understand why you solve the problem for that role.
Do I really need to adapt my resume for each job?
Yes, at least the summary and the emphasis in your experiences. Adapted resumes have higher match with the job, both for the ATS and human readers. With a consolidated base, adaptation takes only a few minutes.