What is an applicant tracking system?
An Applicant Tracking System (ATS) is software used by companies to manage hiring. It collects, scans, and organizes job applications before recruiters review them.
Companies use tools like Workday and Greenhouse to handle large numbers of resumes efficiently.
In simple terms, an ATS:
- Stores resumes
- Scans for keywords
- Helps recruiters find the best candidates
Some systems also rank or score resumes based on job relevance.
Applicant tracking system overview
An ATS acts like a digital gatekeeper. Every resume goes through it first before reaching a recruiter.
It checks:
- Skills
- Experience
- Keywords
Only resumes that closely match the job requirements move forward. This is why small mistakes in your resume can cost you an interview.
Why are applicant tracking systems used?
Companies use ATS because hiring has become too large and fast for manual processing.
Main reasons:
- Saves time in hiring
- Handles thousands of applications
- Improves hiring quality
- Keeps recruitment organized
This means many qualified candidates never get seen by a human recruiter if their resume is not optimized.
What does an applicant tracking system do?
An ATS manages the complete hiring workflow from start to finish.
It helps with:
- Posting job openings
- Collecting applications
- Filtering resumes
- Tracking candidates
- Managing interview stages
Platforms like Lever automate this entire process for recruiters.
How does an applicant tracking system work?
Resume parsing
The ATS breaks your resume into readable data like skills, education, and experience.
Keyword matching
It compares your resume with the job description.
Candidate filtering
Only the most relevant resumes move forward to recruiters.
How ATS Actually Reads Your Resume (Step-by-Step)
What ATS scans first
- Job titles
- Skills
- Keywords
How keyword matching works
The system compares your resume with the job description. The more matches, the better your chances.
What gets filtered out
- Missing keywords
- Complex formatting
- Images and graphics
Why your resume is not getting selected by ATS
Many job seekers think they are being rejected by recruiters. In reality, the ATS is often the first barrier.
Common reasons include:
- Missing important keywords
- Using complex resume designs
- Not tailoring resume per job
- Using unclear job titles
Fixing these small issues can dramatically increase interview chances.
Who uses an applicant tracking system?
ATS is used by:
- Recruiters
- HR departments
- Hiring managers
Most medium and large companies rely on ATS today.
Use cases for an ATS
- Hiring employees
- Managing job applications
- Building talent pools
Types of Applicant Tracking Systems
ATS vs Human Recruiter
| ATS | Human Recruiter |
|---|---|
| Filters resumes automatically | Reviews shortlisted candidates |
| Uses keywords | Uses judgment |
| Fast screening | Detailed evaluation |
Both work together in modern hiring systems.
ATS vs Recruiting CRM
An ATS focuses on managing job applications. A recruiting CRM focuses on building relationships with candidates for future hiring.
Many modern platforms combine both systems.
Why is an ATS important?
ATS systems help companies:
- Reduce hiring time
- Manage large applicant volumes
- Improve candidate matching
For job seekers, it means your resume must be optimized before applying.
The evolution of applicant tracking systems
Earlier, recruiters manually reviewed every resume. It was slow and inefficient.
Now, ATS systems use automation and AI to process thousands of resumes in seconds.
What are the capabilities of an ATS and recruiting platform?
Posting jobs
Jobs are distributed across platforms.
Reviewing applications
Resumes are filtered and organized.
Interview management
Interview schedules are automated.
Hiring and onboarding
Candidates are tracked through the hiring process.
Popular Applicant Tracking Systems
Problems and Limitations of ATS
- May filter out qualified candidates
- Depend heavily on keywords
- Do not fully understand context
Understanding this helps you optimize your resume better.
ATS Keywords Example
For a job like Digital Marketing Manager, ATS may look for:
Simple ATS-Friendly Resume Format
- Name and contact
- Skills section
- Work experience
- Education
Tips for passing an applicant tracking system
- Use job-specific keywords
- Keep formatting simple
- Avoid images and tables
- Customize your resume for each job
Real Example: Why One Resume Gets Selected
Uses clear keywords and simple formatting.
✓ Gets ShortlistedUses a designed resume with fewer relevant keywords.
✗ Gets Filtered OutPersonal Experience Insight
"I applied to over 30 jobs without success. After fixing my resume keywords and format, I started getting interview calls within weeks."
"Most resumes fail not because of lack of skill, but because they are not optimized for ATS."
What to look for when considering an ATS
- Features
- Ease of use
- Integration options
When should an organization implement an ATS?
Use ATS when hiring increases and manual hiring becomes slow.
When should you upgrade your ATS?
Upgrade when systems become outdated or hiring needs grow.
FAQs About Applicant Tracking Systems
Conclusion
After working with many resume optimization cases, one clear pattern appears — most people don't fail because they are unqualified, but because their resume is not structured for ATS systems. Even strong experience can be filtered out if the resume is not optimized correctly.
From an expert perspective, ATS is not something you can avoid — you must learn how to work with it. Once you understand how it reads resumes, you can significantly improve your chances of getting interviews without changing your actual experience.
Before applying to any job, always test your resume first. Use an ATS Resume Checker on ATSResumePro to see how your resume performs in real ATS systems. This small step can make a big difference in whether your resume gets seen or ignored.