How Does an ATS Work? A Guide for Employers and Job Seekers
Table of Contents
- What Is ATS?
- For Job Seekers: How to Get Your Resume Reach to an HR
- For Employers: ATS Best Practices That Actually Improve Hiring
- How RAPS Approaches ATS and Recruitment Technology
- ATS Do’s and Don’ts
- Working With a Staffing Partner That Knows Both Sides
Search this topic and you’ll find two very different crowds asking the same question: “How does an ATS work?” Job seekers want to know why their resume disappears into a black hole. Employers want to know why great candidates never show up in their pipeline. Both problems usually trace back to the same system — and the same mistakes.
At RAPS, we sit in the middle of both sides every day. Here’s what we’ve learned about ATS technology, and the practices we actually use to make it work for people instead of against them.
What Is ATS?
An Applicant Tracking System (ATS) is software that companies use to collect, sort, and filter job applications before a human ever sees them. Popular examples include Workday, Greenhouse, iCIMS, and Bullhorn.
How does an ATS work? An Applicant Tracking System collects job applications, reads resume information, and helps recruiters organize candidates throughout the hiring process. Depending on the platform and employer settings, an ATS may support resume parsing, keyword matching, candidate filtering, interview scheduling, and recruitment reporting.
Contrary to the myth, most modern ATS platforms don’t “auto-reject” resumes with some ruthless algorithm. What they actually do is:
- Parse your resume into structured data (name, job titles, dates, skills)
- Rank or filter candidates based on keyword and qualification matches
- Organize where each candidate sits in the hiring pipeline
- Flag missing information or formatting the system couldn’t read
The problem isn’t usually the ATS itself. It’s that most resumes — and most hiring workflows — aren’t built with how these systems actually read data in mind.
For Job Seekers: How to Get Your Resume Reach to an HR
If you’ve applied to dozens of roles and heard nothing back, this is usually why.
- Use standard section headings
“Work Experience,” “Education,” “Skills” — not creative alternatives like “Where I’ve Been” or “My Journey.” ATS software looks for standard labels to parse your information correctly.
- Skip tables, columns, text boxes, and graphics
Many systems can’t read text inside tables or multi-column layouts. If the parser can’t extract it, that information may as well not exist. A single-column, plain-text-friendly format performs far better than a designer template.
- Match the language in the job posting
If the listing says “project management,” don’t only write “managed projects.” ATS ranking is largely keyword-driven, so mirror the exact terms and skills the posting uses — as long as they’re genuinely true of your experience.
- Spell out acronyms once
“Search Engine Optimization (SEO)” catches both the acronym and the full-term searches recruiters run.
- Save it as a .docx or a text-readable PDF
Some older systems still struggle with certain PDF exports. When in doubt, .docx is the safest format.
- Don’t keyword-stuff
Hiring managers still read the resumes that pass the filter. A resume packed with invisible or repeated keywords gets flagged by recruiters just as fast as a bad one gets flagged by software.
For Employers: ATS Best Practices That Actually Improve Hiring
Job seekers aren’t the only ones getting filtered out by bad ATS habits. Companies lose strong candidates every day because of how their system is set up.
- Don’t over-filter with rigid keyword requirements
Requiring an exact keyword match can eliminate excellent candidates who describe their experience differently than your job posting does. Build in flexibility, or have a recruiter manually review borderline profiles before they’re auto-rejected.
- Keep your candidate database alive, not just active postings
The biggest missed opportunity in most ATS setups: candidates who weren’t right for one role but are a strong fit for the next one. If your system is only used to manage open requisitions, you’re rebuilding your pipeline from zero every time.
- Standardize your evaluation stages
An ATS is only as useful as the process behind it. Every recruiter and hiring manager should be moving candidates through the same defined stages, with the same criteria — otherwise the “visibility” an ATS promises becomes noise instead of signal.
- Automate the repetitive, not the relational
Scheduling, status updates, and follow-up reminders are good candidates for automation. First conversations, offer negotiations, and candidate experience should stay human. Over-automating the parts of hiring that build trust is one of the fastest ways to lose good candidates to a faster-moving competitor.
- Audit your ATS data regularly
Duplicate profiles, outdated statuses, and incomplete records quietly erode the value of the system over time. A quarterly cleanup keeps your pipeline searchable and reliable instead of just full.
- Review your time-to-fill and drop-off points
Where are candidates disengaging — after the application, after the first interview, after the offer? Your ATS should be giving you this data. If it isn’t being reviewed, it’s just a filing cabinet.
How RAPS Approaches ATS and Recruitment Technology
We treat ATS technology as a tool that supports our recruiters — not a replacement for them. In practice, that means:
- We review borderline candidates manually. Keyword filters help us manage volume, but they don’t make the final call on whether someone is a fit.
- We keep an active, searchable talent network, not just a list of applicants to open roles — so when a new opportunity comes in, we’re not starting from zero.
- We standardize how candidates move through our pipeline, so hiring managers get consistent visibility into where every search actually stands.
- We use automation for logistics, not relationships — follow-ups and scheduling are streamlined, but every candidate conversation is handled by a person.
This is the combination we come back to again and again: people, process, and technology, working together instead of any one of them trying to do the whole job alone.
ATS Do’s and Don’ts
| Do | Don’t | |
| Job Seekers | Use standard headings and job-posting keywords | Use tables, columns, or creative section titles |
| Employers | Keep candidate data active and searchable long-term | Let the ATS auto-reject without human review |
| Both | Treat the ATS as one part of the process | Treat the ATS as the entire process |
Working With a Staffing Partner That Knows Both Sides
Whether you’re trying to get noticed by the right employers or trying to make sure your ATS isn’t quietly filtering out your best candidates, the fix is rarely “get better software.” It’s building a process where technology, people, and structure actually work together.
Looking for your next role, or trying to fix a hiring process that isn’t finding the people you need? Connect with RAPS.
