Tailoring a resume for ATS vs a human reader

What ATS software actually does

Most ATS platforms, including Greenhouse, Lever, Workday, iCIMS, and Taleo, convert your resume file into plain text and then extract fields like job titles, employers, dates, skills, and education. They do not read meaning. They look for exact or near-exact matches to terms in the job posting.

A common misconception is that ATS ranks you against other candidates. In most implementations it filters and organises. A recruiter then opens the parsed profile or the original file. That means your resume needs to survive the parse and look good when a person opens it.

• Accepted file types: PDF is safe on most modern ATS; DOCX is safer on older Taleo versions. When in doubt, submit DOCX.
• Fields the parser looks for: contact details, job title, employer name, start and end dates, degree, institution, and skills.
• What breaks parsing: text inside tables or text boxes, headers and footers, images, columns in some PDF exports, and non-standard fonts that embed oddly.

Keyword strategy that works for both audiences

Keywords matter to ATS because they trigger matches. They matter to humans because they signal relevance at a glance. The goal is to use the right terms in context, not to stuff a skills section with every word from the posting.

Read the job posting carefully and note the exact phrases used. If the posting says 'stakeholder management', use that phrase, not 'managing stakeholders'. If it says 'Python' and 'SQL', both should appear in your experience bullets, not just in a skills list at the bottom.

Avoid hiding keywords in white text or repeating them ten times. Modern ATS platforms flag keyword stuffing, and a recruiter who sees it will discard the application immediately.

1. Copy the job title from the posting into your resume headline if it accurately describes your role.
2. Mirror the exact phrasing of three to five core requirements in your bullet points.
3. Add a concise skills section with tools and technologies listed as single terms or short phrases.
4. Read your resume aloud. If a sentence sounds robotic, rewrite it. Keywords should sit inside natural sentences.

Formatting rules that satisfy both

A clean, single-column layout with standard section headings is the safest choice. It parses reliably and is easy for a human to read in under thirty seconds, which is roughly how long a recruiter spends on a first pass.

Use standard heading labels: Summary, Experience, Education, Skills. Avoid creative labels like 'My Story' or 'Where I Have Been'. ATS systems are trained on conventional labels and may skip sections they do not recognise.

Font size should be 10 to 12 points for body text and 14 to 16 for your name. Margins of 0.5 to 1 inch keep the document from looking cramped. Bullet points should use a simple round bullet, not arrows, checkmarks, or custom symbols, which can render as question marks after parsing.

• Use bold for job titles and employer names, not for random phrases mid-sentence.
• Keep dates consistent: either 'Jan 2023 – Mar 2025' or '01/2023 – 03/2025' throughout.
• Avoid headers and footers for contact details. Place your name, email, phone, LinkedIn URL, and location in the main body at the top.
• If you use a two-column layout, test it by copying the text from the PDF into a plain text editor. If the columns merge into unreadable lines, switch to single column.

Writing bullets that score well and read well

ATS systems extract skills and responsibilities from bullet points. Humans use bullets to judge impact and scope. A bullet that does both starts with a strong verb, names the skill or tool, and ends with a result or scale.

A weak bullet: 'Responsible for managing social media accounts.' An ATS will extract 'social media' but a human learns nothing useful. A stronger version: 'Managed organic social media across Instagram and LinkedIn for a 40,000-follower brand, growing engagement rate from 2.1% to 3.8% over six months.' The ATS still extracts 'social media', 'Instagram', and 'LinkedIn', and now a recruiter has evidence.

If you do not have a precise number, use a range or a qualifier: 'reduced onboarding time by roughly 30%' or 'supported a team of eight engineers'. Vague claims like 'improved efficiency significantly' help neither audience.

Where to customise for each application

You do not need a completely different resume for every job. You need a strong base document and a targeted top section. The summary or headline at the top is the easiest place to swap in the job title and one or two keywords from the posting. This takes two minutes and meaningfully improves keyword density without touching the rest of the document.

The skills section is the second place to adjust. Add or reorder skills to match the posting. If the role emphasises Tableau and your base resume lists it fifth, move it to the top of the list.

Experience bullets are worth editing only when a posting emphasises something you have done but buried. Promote that bullet to the top of the relevant role. Do not fabricate or exaggerate. ATS systems do not verify claims, but interviewers do.

How Break-In Bad handles tailoring

If you want the tailoring done for you, Break-In Bad's AI assistant Omar reads the full job posting, including location, visa requirements, time zone, and seniority level, and scores the match before writing anything. For roles scored 75% or above, she writes a tailored resume and cover letter using only facts you have confirmed, then applies directly on Greenhouse, Lever, Workday, and other employer sites with a screenshot as proof.

The resume enhancement process works through a conversation of up to 20 questions where you tap or speak your answers. Omar checks every line against what you said and keeps your original wording where it is accurate. This means the output is both keyword-matched to the posting and written in a voice that sounds like you, which matters when a recruiter reads it.