What is ATS? How to Write an ATS-Friendly Resume to Pass Screening Software

systems requires a balance between minimalist presentation and keyword-rich content. Remember to Understanding this mechanism helps you create a more accurate resume to increase your chances of getting an interview. Before submitting your application to a recruiter, you can

check your resume for free on Ezlun to refine your resume in time before submitting it to recruiters. The assessment results are for reference based on algorithms and common recruitment standards in 2026, helping you increase your chances of reaching the interview stage. What is ATS and How Does It Work?

What is ATS

? An Applicant Tracking System is software that companies use to automate the recruitment process from receiving applications to filtering suitable candidates. According to estimates from many HR professionals, about 70-80% of large enterprises and multinational corporations currently use this software to save time on initial screening. The typical operating mechanism of an applicant tracking system includes the following steps:

Resume Reception

: When you apply through job websites or company career pages, your resume information is stored in a database. Information Scanning and Data Conversion

: The software parses sections of the resume into plain text for processing. Keyword Filtering

: The system compares this text with predefined criteria in the Job Description (JD) such as skills, years of experience, and education. Candidate Ranking

: Based on the keyword match rate, the software automatically scores resumes and generates a list of the highest-scoring resumes to send to the HR department. If a resume does not contain the information the software is looking for, it may be rejected even if the candidate is genuinely qualified. Therefore, understanding how this system reads data is key to getting your resume through to the next round.

Why Is Your Resume Rejected by Automated Recruitment Systems?

Many qualified candidates' resumes are still automatically rejected by the system due to technical errors related to formatting or content arrangement. Here are common reasons why resumes fail to pass this technological barrier:

Using Incorrect File Formats

: Although PDF is popular and maintains design across devices, some older systems may struggle to read text information from scanned PDF files. A .docx document or PDF with selectable text. Overly Complex Resume Structure

: Using tables, diagrams, skill level bar charts (e.g., English 80%), or text boxes can disrupt the software's text reading order. The system may skip entire sections of text located within these graphic elements. Non-Standard Section Headings

: Using creative names for sections like "My Journey" instead of "Work Experience," or "Knowledge Backpack" instead of "Education" will prevent the computer from recognizing the information structure for categorization. Lack of Industry-Specific Keywords

: If the job description requires "Google Analytics" skills but you only write generally about "social media data analysis," the automated filter will register that you lack this specific skill. Check your resume for free

- AI analyzes 7 in-depth criteria. How to Optimize for ATS to Pass Resume Screening Software

To increase your score when the system scans your resume, adjusting the presentation and keyword distribution is essential. Here's a detailed guide from the perspective of HR experts.

1. Analyze the Job Description to Find Keywords

Carefully read the job requirements and identify core phrases that are repeated multiple times. These phrases often include names of tools, industry certifications, and specific professional skills. You need to incorporate these exact phrases into your work experience and skills sections with a natural frequency, avoiding meaningless keyword stuffing.

2. Use Standardized Structure and Headings

Keep your resume simple by using common headings that all resume screening systems are programmed to recognize:

Contact Information

Professional Experience

Education

Skills

Certifications

3. Present Content Clearly and Logically

Avoid using complex graphic symbols for bullet points. Use standard dots or squares. When writing about experience, follow a reverse chronological format (most recent experience first) and clearly state: Company Name - Job Title - Employment Period (month/year).

To better understand design errors that can hide your resume from the software, you can refer to our article on

7 common resume mistakes on our platform. Comparing ATS-Optimized vs. Non-Optimized Resumes for System Compatibility

The comparison table below illustrates the difference in resume writing approaches between focusing on conventional visual aesthetics and optimizing for automated screening technology:

Criteria

Here's an illustrative example of how to change writing from a generic sentence to one containing specific keywords that the filtering system can scan and score:

Suboptimal Writing (System does not recognize specific keywords)

: "Experienced in running ads on popular online platforms to find potential customers for the company, generating good revenue." Optimized Writing (Clear keywords)

: "Optimized advertising campaigns on Facebook Ads and naturally incorporate skill keywords from the job description into your resume, increasing lead conversion rate by 15% and achieving annual revenue targets." Including proper nouns like tool names helps the resume immediately match the data fields recruiters set up in the software. This is also crucial for recent graduates who may not have extensive practical experience; you can find specific guidance in the article

Resume for Fresh Graduates to optimize your resume. Assess ATS Compliance with Ezlun CV Checker

Manually reviewing keywords and formatting can easily lead to errors. To help candidates better prepare their resumes, Ezlun has developed an automated analysis tool that simulates how smart filters scan your data.

The system helps you identify technical issues before submitting your official application:

Detects Formatting Errors

: Warns about text areas hidden within text boxes or complex tables. Checks Keyword Density

: Compares your resume with a specific job description to see if you have included all required skills. Overall Scoring

: Provides an intuitive score based on layout, length, and information structure criteria. You can upload your resume to directly experience the

free resume check feature on Ezlun to refine your resume in time before submitting it to recruiters. The assessment results are for reference based on algorithms and common recruitment standards in 2026, helping you increase your chances of reaching the interview stage. Frequently Asked Questions

Is a Vietnamese or English resume more likely to pass automated filters?

Modern applicant tracking systems can process both languages if the fonts display correctly. However, systems often recognize industry-specific keywords in English (such as software names, methodologies) better due to higher consistency in the industry.

Is writing white text to stuff hidden keywords into a resume effective?

No. This is an old trick, and current resume screening software converts all documents to plain text format. At this point, all hidden white text will become visible to the recruiter, and your resume will be immediately rejected for fraudulent behavior.

Does resume screening software automatically reject candidate resumes if they don't achieve 100% ATS keywords?

No. The system typically ranks candidates from highest to lowest based on the match rate. Recruiters will review resumes from the highest scores downwards until they find enough suitable candidates to interview.

Conclusion

Optimizing your resume to pass modern

ATS systems requires a balance between minimalist presentation and keyword-rich content. Remember to use safe file formats, standardize category headings, and naturally incorporate skill keywords from the job description into your resume. With just a few small technical changes, you can help your resume stand out and increase your chances of direct access to recruiters. To ensure your resume has no technical errors, score and check your resume on Ezlun today. ngay hôm nay.