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How AI Search Works

The five steps behind every search: text to filters, hard filters, semantic and keyword ranking, explained results, refinement. Then the details on synonyms and hybrid matching.

Written by Jan Alexander Jedlinski

What happens when you run a search

  1. Your text becomes a structured search. The AI reads what you typed (or the Bullhorn job description) and fills in the filter panel for you: experience range, skills with the most important ones marked required, location and radius, and an Ideal Candidate Brief that captures the rest of the meaning.

  2. Hard filters narrow the pool. Required skills, excluded skills, the experience range, location and any Bullhorn filters remove candidates that don't meet the facts.

  3. Semantic and keyword matching rank the rest. Every remaining candidate is scored on meaning (does the profile describe this kind of person?) and on exact matches. Synonyms and title variations are handled automatically: React = ReactJS = React.js; "Développeur React" matches "React developer".

  4. Each result is explained. The AI writes a short summary and a list of evaluations per candidate, which requirements are met and which are not, with the evidence taken from the resume.

  5. You refine. Anything you type next into the search bar is merged into the same search. Filters update, results re-rank.

What this means in practice

  • You don't have to guess the words on the resume. Describe the role.

  • Required skills are strict. Everything else is a signal the AI weighs.

  • The score is relative to your search, not an absolute grade of the candidate. Change the search and the scores change.

The details

Understanding how Candidate Search AI finds the right talent

AI Search is the next generation of candidate discovery. Instead of relying only on keywords, it uses artificial intelligence to understand meaning, context, and intent—just like a human recruiter would when reading a resume.

Here’s how it works and why it gives you better, more accurate results.


🔍 It starts by understanding what you mean, not just what you type

Traditional search engines match exact words.
AI Search goes deeper.

When you type something like:

“Senior React developer with fintech experience in London.”

AI interprets:

  • The seniority level

  • The tech stack

  • The industry

  • The location

  • Related skills and synonyms

It transforms your sentence into a structured, intelligent search query.


🧠 AI Search uses Semantic Search, not just keywords

In most ATS systems, search is keyword-based:

  • It looks for exact words

  • Misses variations (“ReactJS” vs “React”)

  • Doesn’t understand context

  • Doesn’t know roles, industries, or skill relationships

AI Search replaces this with Semantic Search — search based on meaning.

This allows the system to understand:

  • Skill variations (React ↔ ReactJS ↔ React Native)

  • Related concepts (“Financial systems” for fintech roles)

  • Equivalent job titles (“Senior Backend Engineer” ≈ “Senior Developer”)

  • Misspellings and language differences

It connects the dots the way a human does.


🧩 Smart Synonym Matching (behind the scenes)

Candidates describe skills differently.

AI Search automatically picks up:

  • Synonyms

  • Abbreviations

  • Common misspellings

  • Localized terminology

  • Industry-specific equivalents

You don’t have to think of every variation—AI does that for you.

For example:

  • “RN” ↔ “Registered Nurse”

  • “AP” ↔ “Accounts Payable”

  • “Forklift Driver” ↔ “Forklift Operator”

  • “CSR” ↔ “Customer Service Representative”


⚡AI blends Semantic Search with keyword precision

AI Search doesn’t throw away keywords—it combines both:

  • Keywords ensure accuracy when you need exact terms

  • Semantic Search broadens the search to include relevant matches

  • Re-ranking models sort results by relevance

This hybrid approach gives you:

  • More complete results

  • Fewer false negatives

  • Better matches in the top positions


📄 It reads the full candidate profile

Instead of scanning only a few fields, AI Search analyzes:

  • The entire resume (profile data)

  • Skills and experience

  • Job history

  • Education

  • Certifications

  • Location preferences

  • Industry background

This is how AI finds relevant candidates even when the resume wording doesn't match your wording.


🎯 It ranks candidates by relevance

AI doesn’t just return a list—it sorts candidates by how well they match your intent.

It looks at:

  • Skill fit

  • Seniority

  • Industry experience

  • Location match

  • Strength of experience

  • Missing skills

  • Synonym and concept alignment

This ranking helps you see the most relevant candidates first.


💬 It explains why each candidate matches

Each candidate gets an AI-generated summary that highlights:

  • Why the candidate is a fit

  • What skills match your search

  • Anything missing

  • Relevant experience pulled from the resume

This saves you significant time when screening.

🆚 Summary: How AI Search differs from traditional search engines

Traditional Search

AI Search

Matches exact words only

Understands meaning & intent

Looks at simple text

Reads full resume context

Requires guessing the right keywords

Understands natural language

Misses synonyms and variations

Picks up related terms & spellings

Linear, basic ranking

AI relevance scoring

Easy to miss great candidates

Surfaces the best matches first

👋 We are always here for you if you need us!

Remember, our whole team is around almost 24/7 to support you! In fact, you can simply press the messenger button on the bottom right of this page to start chatting with us! Our team will be happy to assist you.

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