How does an ATS rank candidates?

Keyword matching is the biggest ranking signal

Most ATS platforms parse your resume into plain text and then count how many terms from the job posting appear in your document. The match is usually exact or near-exact, so synonyms do not always help. If the posting says 'stakeholder management' and your resume says 'client relations', the system may score those as two different concepts.

Hard skills, software names, and certifications carry the most weight because they are specific and easy to match. Soft skills like 'communication' or 'team player' are common across thousands of postings and add little to your score on their own.

• Copy the exact phrases from the requirements section, not just the job title area
• Include both the spelled-out form and the acronym: 'Search Engine Optimisation (SEO)' covers both
• Check the 'preferred qualifications' section too; those terms still count toward your score
• Repeat high-priority keywords two or three times naturally across different sections

Job title matching and seniority signals

The ATS compares your most recent job title against the title in the posting. A close match signals that you have done this exact role before. If you held the title 'Senior Data Analyst' and the posting asks for 'Lead Data Analyst', the system may still score you well because the words 'data' and 'analyst' overlap. But if your title was 'Business Intelligence Specialist', the overlap drops significantly even if the work was identical.

Seniority words matter too. Systems trained on US, Canadian, UK, and Australian job data recognise a hierarchy: coordinator, specialist, analyst, senior, lead, manager, director, VP. If the posting is for a manager role and your most recent title is coordinator, the gap in seniority can lower your ranking even if your bullet points describe management work.

• Where your actual title is non-standard, add a parenthetical: 'Growth Hacker (Digital Marketing Manager)'
• Do not fabricate titles, but do use the parenthetical approach to clarify internal naming conventions
• Mirror the seniority level in your summary line as well as your work history

Recency and employment gaps

ATS platforms weight recent experience more heavily than older roles. A skill listed under a job from 2019 scores lower than the same skill listed under a role from 2024 or 2025. This is why your most recent position should contain the densest concentration of relevant keywords.

Employment gaps do not automatically disqualify you, but they can lower your recency score if your last listed role ended more than six to twelve months ago. Freelance work, contract roles, and volunteer positions with clear dates help fill that gap and keep your recency signal strong. List them the same way you would a permanent role.

Formatting signals that hurt your score

ATS parsers convert your resume to plain text before scoring it. Anything that breaks that conversion reduces the number of keywords the system can read. Tables, text boxes, headers and footers, and graphics are common culprits. A keyword buried inside a table cell may be read as a formatting artifact and ignored entirely.

File format also matters. PDF is safe on most modern platforms including Greenhouse, Lever, and Workday. DOCX is safe on virtually all of them. Avoid PAGES files, image-based PDFs, and heavily designed templates built in Canva or similar tools unless you can verify the employer's ATS handles them correctly.

• Use a single-column layout or a simple two-column layout with no text boxes
• Put contact information in the body of the document, not in a header or footer
• Use standard section headings: Experience, Education, Skills, Certifications
• Avoid icons, logos, and profile photos; they add no keyword value and can confuse parsers

How to calculate and improve your own match score

Paste the job posting and your resume into a plain text document side by side. Highlight every term in the posting that does not appear in your resume. That list is your gap. Prioritise terms that appear in the required qualifications section, then the responsibilities section, then preferred qualifications.

A practical target is to match 70 to 80 percent of the required-skills terms and 50 to 60 percent of the preferred-skills terms. Beyond that, adding more keywords without context can read as keyword stuffing to the human reviewer who sees your resume after the ATS passes it through.

Break-In Bad scores each job against your profile before you apply, flagging roles where your resume already matches well enough to auto-apply and roles where a targeted enhancement would move you into a stronger position. The resume enhancement conversation asks up to 20 questions to surface experience you may have forgotten to include, then rewrites each line using only facts you confirm.

1. List every required skill from the posting
2. Check which ones appear in your resume verbatim
3. Add missing high-priority terms to the most relevant bullet points
4. Read the result aloud to confirm it still sounds like natural English
5. Check formatting by pasting into a plain text editor and scanning for garbled characters

Signals that vary by ATS platform

Not every ATS uses the same algorithm. Workday, which is common in large enterprises across the US, Canada, the UK, and Australia, uses a semantic matching layer that understands some synonyms. Greenhouse and Lever are lighter-weight systems that rely more on recruiter-defined keyword filters than on automated scoring. iCIMS and Taleo, still used by many government and healthcare employers, tend to be stricter about exact keyword matches.

When you know which ATS a company uses, you can adjust your strategy. Workday gives you slightly more flexibility with synonyms. Taleo rewards exact repetition of the posting's language. If you cannot identify the ATS, default to exact matching; it works across all platforms.

• Check the URL on the application page: 'myworkdayjobs.com' means Workday, 'greenhouse.io' means Greenhouse, 'jobs.lever.co' means Lever
• Taleo URLs often contain 'taleo.net' or 'oraclecloud.com'
• iCIMS URLs typically contain 'icims.com'