What an applicant tracking system does with your resume
An applicant tracking system stores each application in a queue that recruiters review, search and filter. Greenhouse says most applications are reviewed by people, though employers can also set rules that automatically reject or advance applications on specific criteria, such as work authorization.
What an applicant tracking system is
An applicant tracking system (ATS) is, in the words of a 2021 Harvard Business School and Accenture report, "a workflow-oriented tool that helps organizations manage and track the pipeline of applicants in each step of the recruiting process." Workday, Greenhouse and Lever are three widely used examples. When you click submit on an employer's careers page, you are usually filling in a form that belongs to one of these systems.
The same report describes a companion category, recruiting management or marketing systems, which support sourcing, talent pools and "automated candidate scoring." In practice the two are often bundled, which is why "ATS" gets used for everything from a simple inbox to a scoring engine. What your application meets depends on which features the employer has switched on.
What happens when you submit
Greenhouse's own description, published January 8, 2025, is the clearest first-party account of the process. According to that post, your application goes into a queue on a recruiter's dashboard. Recruiters see your resume, cover letter, answers to the application questions and any supporting documents as you sent them. They can add tags, leave feedback for the hiring team, and advance or reject the application.
Greenhouse also says most recruiters review applications in the order they were received, but two things can change that:
- Filtering the queue. For popular roles with hundreds or thousands of applications, a recruiter may filter or search the queue and look at the best matches first.
- Auto-reject and auto-advance rules. A recruiter can configure a job so that a particular answer rejects or advances an application automatically.
The same post says these rules are set and controlled by recruiters rather than a bot. That matters for how you apply: the questions on the form are often the part that gets machine-checked, not the prose of your resume.
How recruiters search and filter
Search is where your resume's wording matters most. Two Greenhouse help pages show what recruiters actually have available.
- Talent filtering. Greenhouse's documentation says recruiters can search the full text of resumes and internal notes for job titles, skills, locations and other keywords. Keywords can be "required" (all must appear) or "preferred" (at least one must appear). The page states that a keyword must exactly match the keyword in the application to appear in results. Recruiters can then filter by location, referrals, scorecard status, education or custom criteria.
- Boolean search. Greenhouse's Boolean search page lists AND, OR and NOT operators, quotation marks for exact phrases, parentheses for grouping, and an asterisk wildcard such as Java*. It notes that Boolean search is a Full Text Search option on the All Candidates page and depends on the employer's subscription tier.
Other systems work on the same principle. Lever, for example, lets employers set up application workflows. A Lever blog post describes a "rules-based workflow" that lets only applicants who meet a pre-defined list of criteria, such as years in a role, education, certifications or location, reach recruiters for review.
Does an ATS rank or score your resume?
It depends on the product and on the employer's settings, and the vendors answer differently.
| System | What the vendor says | Source |
|---|---|---|
| Greenhouse | Auto-rejection is based on specific rules set by recruiters. Its AI doesn't score or rank applications or decide whether you move forward (as of January 2025). | Greenhouse |
| Workday | Its AI isn't designed to automatically reject candidates. It gives hiring teams information on how well an application matches the employer's requirements for the role (as of April 2026). | Workday |
| Lever | Employers can set up rules-based workflows that filter applicants by criteria such as experience, education, certifications or location before recruiter review. | Lever |
The Greenhouse post adds a caveat from the other direction: it says "some companies" use AI to analyze, score and auto-reject applications without human input, and that Greenhouse's own system isn't one of them. So the honest answer is that some employers' setups screen automatically and many don't, and you usually can't tell which from the outside.
The myths worth ignoring
Myth: most resumes are rejected by the ATS before a person sees them
You'll see precise-sounding percentages repeated online. We haven't found a primary source for any of them, so we don't repeat them here. What the vendors' own documentation does support is narrower: employers can configure rules that reject or filter some applications, and recruiters search large queues by keyword. That is a long way from a robot silently discarding most resumes.
Myth: you need "magic keywords"
Greenhouse's post says you don't have to stuff your application with keywords to appear in recruiters' search results. It says its system suggests relevant keywords and synonyms from the job description for recruiters to search, for example suggesting related terms like React or TypeScript for a JavaScript role. That is Greenhouse describing its own product, though, and its help page says a search keyword must exactly match the text in the application. The practical takeaway is to use the job ad's real terms where they're true, not to pad.
Myth: fancy formatting beats plain formatting
None of the vendor pages we reviewed describe a design score. Recruiters see your resume, cover letter and answers "exactly as you sent them," per Greenhouse. A clear layout with standard headings is enough, and what counts is that the content can be read and searched.
Myth: demographic questions count against you
Greenhouse says that on applications through its candidate portal, the demographic information you provide is never shown alongside your application and is used only for aggregated, anonymized reporting. That is one vendor's statement about one setup, so treat it as that.
Where a real filter can hurt: rigid criteria
The most useful research on ATS filtering is less about keywords than about criteria. The Harvard Business School and Accenture team surveyed more than 8,000 workers and more than 2,250 executives across the U.S., the U.K. and Germany. They found that more than 90% of employers in their survey use their recruiting management system to initially filter or rank candidates: 94% for middle-skills roles and 92% for high-skills roles.
The same report says these systems tend to use proxies such as a college degree or precisely described skills, and that most use failing a criterion, such as a gap in full-time employment, as grounds to exclude a candidate. It also reports that 88% of employers agreed that qualified high-skills candidates are vetted out because they don't match the exact criteria in the job description; the figure was 94% for middle-skills candidates. The authors recommend shifting from "negative" filters to "affirmative" ones that look for the skills a role actually needs.
Two cautions on reading that. First, it's a 2021 survey of employers, so it describes practice then, not any particular system now. Second, it concerns exclusion criteria set by employers, not a hidden quality score. For you, the implication is that hard requirements in a job ad (a certification, a work-authorization question, a minimum qualification) are the ones most likely to be applied mechanically. Answer them accurately and read them carefully before applying.
What to do with this when you apply
- Mirror the job ad's own terms where they're true. Search is by keyword, so if the ad says "customer onboarding" and you've done exactly that, say "customer onboarding." Our guide on tailoring your resume to a job description covers how to do this without exaggerating.
- Answer knockout-style questions honestly and carefully. Work authorization, certifications, location and similar questions are the kind of thing recruiters can turn into automatic rules.
- Put the evidence in the text. Skills, job titles and tools should appear as readable text so a recruiter's search can find them.
- Don't assume a silent application was never read. Greenhouse says a recruiter might filter the queue without sending a note, so no reply doesn't tell you which of several things happened.
- Apply where the system actually receives the application. Job-board quick-apply buttons and employer forms can behave differently; see Easy Apply versus the company website.
How Applier handles this
Applier tailors your resume to each job ad's wording, writes a new cover letter per role, and submits on the employer's own application form or applicant tracking system. Applier fills in answers you haven't given and lists them under "Answers to check". Some applications can't be finished; these show as Failed in your dashboard. How Applier works.
A quick note on odds
Because filtering rules differ by employer and role, it's hard to say how an ATS affects any one application. If you want to think about volume instead, see how many applications it takes to get an interview.
The reliable summary: an ATS is mainly a database and workflow tool. Recruiters search it, employers can set rules on specific answers, and vendors differ on whether any scoring happens. The Harvard Business School and Accenture research suggests hard, rigid criteria are a bigger risk than formatting.
Related guides
- How to tailor your resume to a job description
- Easy Apply or the company website: where should you apply?
- Should you attach your resume when emailing a hiring manager?
Frequently asked questions
Does an applicant tracking system automatically reject resumes?
Sometimes. Greenhouse says most applications are reviewed by people, but employers can set rules that automatically reject or advance applications based on specific answers, such as work authorization. Workday says its AI isn't designed to automatically reject candidates. What happens depends on the system and the employer's settings.
Do I need to stuff my resume with keywords for an ATS?
No. Greenhouse says candidates don't need "magic keywords" and that its system suggests related terms to recruiters. Its help page also says a search keyword must exactly match the text in the application, so use the job ad's own terms where they are true instead of padding.
Which job application questions are most likely to be checked automatically?
Questions with a clear yes/no or fixed answer, such as work authorization, required certifications or location. Greenhouse and Lever both document rules that can reject, advance or filter applications on criteria like these, so answer them carefully and accurately.
Sources
- Hidden Workers: Untapped Talent, Harvard Business School Project on Managing the Future of Work and Accenture, 2021
- What really happens after you apply for a job?, Greenhouse, 2025
- Talent Filtering, Greenhouse Support, 2026
- Search candidates using Boolean queries, Greenhouse Support, 2026
- AI in Hiring: Debunking the Top Misconceptions, Workday, 2026
- The Pros of an Automated Talent Acquisition Process, Lever, 2026