ATS & CV
5 min read

What Is an Applicant Tracking System (ATS)? How It Filters Your CV

An Applicant Tracking System (ATS) is the software most UK employers use to manage job applications. It collects CVs, parses them into searchable data, and scores or filters candidates before any human reviewer gets involved. Understanding how it works is essential for anyone applying for jobs in the UK today.

See how your CV scores in any ATS

Paste a job description and upload your CV. JobAgent247 simulates ATS scoring and shows you exactly how to improve your match rate.

Try free

How ATS systems work in practice

When you apply for a job online, your CV is typically uploaded into an ATS. The software reads the document, extracts structured data (your name, contact details, job titles, dates, skills, qualifications), and indexes it into a searchable database. Recruiters then search this database using keywords, filter by qualifications, and rank candidates by ATS match score before reviewing CVs manually.

  • Parsing: the ATS reads your CV file and converts it into structured database fields
  • Indexing: your extracted data is stored and made searchable by keyword
  • Scoring: the ATS compares your profile against the job requirements and generates a match score
  • Filtering: recruiters set thresholds — applications below a score may be auto-rejected
  • Review: qualifying CVs are surfaced to human recruiters for manual review

Which UK employers use ATS systems?

Most organisations with 10+ staff and any significant hiring volume use some form of ATS. The scale varies:

  • Large corporates (HSBC, BT, Amazon, NHS Trusts): enterprise ATS like Workday, Taleo, or SuccessFactors with automated scoring
  • Mid-size companies (50–500 staff): Greenhouse, Lever, or Pinpoint — still scored, but often with more human review
  • Startups and SMEs: Workable, Recruitee, or similar — lighter ATS, more human review
  • Public sector: Civil Service Jobs, NHS Jobs, TRAC — government-specific systems with structured application forms
  • Very small businesses (under 10 staff): often review CVs manually without ATS

What ATS systems look for in your CV

Every ATS has a slightly different algorithm, but the core signals are consistent across platforms:

  • Keyword match: do the skills, job titles, and qualifications in your CV match what the employer listed?
  • Job title proximity: how similar is your most recent role to the role being hired for?
  • Tenure and experience: does your years of experience match the required level?
  • Education match: do you hold the required qualifications (or equivalent)?
  • Section structure: can the ATS correctly identify your experience, education, and skills sections?

Frequently asked questions

Can I beat an ATS system?

You do not need to "beat" it — you need to communicate clearly with it. Use clean formatting the ATS can parse, include the keywords from the job description in the language the employer used, and structure your CV in standard sections. A well-optimised CV does not feel keyword-stuffed to a human but scores highly on ATS matching.

What happens to my CV after it passes the ATS?

After ATS filtering, the remaining applications are reviewed by a human recruiter — typically in 7–10 seconds per CV at first pass. Strong ATS scores get your CV in front of a human; strong CV content gets you to interview.

Are there ATS systems that read PDFs?

Most modern ATS systems (Greenhouse, Lever, Workday) can parse clean PDFs accurately. The problem is PDFs created from design tools (Canva, InDesign) that use graphics and layers — these often parse incorrectly. A PDF exported from Word or Google Docs in single-column format is generally safe.

Related guides

What Is an ATS Score? (And Why It Decides If You Get an Interview)

6 min read

How to Write an ATS-Friendly CV: The Complete UK Guide

8 min read

CV vs Resume: What's the Difference and Which Do You Need in the UK?

4 min read

Should You Tailor Your CV for Every Job? (The Data Says Yes)

5 min read

See how your CV scores in any ATS

Paste a job description and upload your CV. JobAgent247 simulates ATS scoring and shows you exactly how to improve your match rate.

Start free

No credit card required · First 100 users get 30 days Pro free