Behind the Scenes

How Bulletproof.ai Works

4 AI Passes

Each analysis runs four sequential AI calls, each specialized for a different dimension of resume quality.

15-30 Seconds

The full analysis completes in under 30 seconds. You see real-time progress as each pass finishes.

100% Private

Your resume and job description are sent directly to the AI for processing. We never store, log, or share your data.

5,000+ Resumes

Our prompts are calibrated from patterns found in 5,000+ real resumes that landed FAANG, Big 4, and Fortune 500 roles.

The 4-Pass Analysis

Each pass uses a different AI persona and prompt strategy to evaluate a specific dimension of your resume

01

Senior Recruiter Match Score

Pass 1 of 4

The AI takes on the role of a senior technical recruiter with 15+ years of hiring experience at top companies. It reads your entire resume alongside the target job description and evaluates how well you match the role.

What it evaluates:

  • Keyword alignment — Does your resume contain the specific skills, tools, and technologies the job requires?
  • Experience relevance — Do your bullet points describe work that directly relates to the job responsibilities?
  • Quantified impact — Do your bullets include numbers, percentages, and measurable outcomes?
  • Seniority fit — Does your experience level match what the role is asking for (intern vs. senior, etc.)?
  • Overall presentation — Is the resume structured, concise, and professional?

What you get:

Score A number from 0–100, where 70+ is competitive and 85+ is strong
Breakdown A 3-4 sentence written analysis explaining why you scored where you did and what's holding you back
72

Your resume has strong technical skills but lacks quantified impact in 3 of 5 bullets. Keywords like "CI/CD" and "Agile" are missing entirely.

02

Missing Keyword Detection

Pass 2 of 4

The AI cross-references the job description against your resume word by word, identifying the most critical keywords and phrases that are completely absent from your resume. These are the terms that ATS systems and recruiters are scanning for.

How it identifies keywords:

  • Required skills extraction — Pulls hard skills, tools, and technologies from the "Requirements" section of the job posting
  • Responsibility mapping — Identifies action-based keywords from the "Responsibilities" section (e.g., "cross-functional collaboration," "stakeholder management")
  • Priority ranking — Ranks missing keywords by how frequently they appear in the job description and how critical they are to the role
  • Context awareness — Doesn't just match exact strings — understands that "Python" and "Python programming" refer to the same skill

What you get:

Top 5 Keywords The five most critical missing keywords, ranked by importance to the role
Explanation For each keyword, a brief note explaining why it matters and where it appears in the job description
1
CI/CD Pipelines Mentioned 3x in job requirements
2
Agile / Scrum Required methodology experience
3
Stakeholder Management Listed in responsibilities section
03

Experience Bullet Rewrite

Pass 3 of 4

This is where the real transformation happens. The AI identifies your weakest experience bullets and rewrites them using proven resume writing techniques that recruiters at top companies respond to.

The rewrite strategy:

  • Google's X-Y-Z formula — Every rewrite follows the structure: "Accomplished [X] as measured by [Y], by doing [Z]." This is the exact format Google's internal career team recommends.
  • 200+ impact verbs — Replaces weak verbs like "Helped," "Responsible for," and "Worked on" with powerful action verbs like "Engineered," "Orchestrated," "Spearheaded," and "Automated."
  • Missing keyword integration — Weaves the missing keywords identified in Pass 2 naturally into rewritten bullets, so your resume addresses the job description directly.
  • Character-length preservation — Each rewritten bullet stays within the same approximate character length as the original (within 10-15 characters), so it fits your existing resume layout without reformatting.
  • Quantified impact — Adds or enhances metrics, percentages, dollar figures, and time savings wherever applicable.

What you get:

Before/After Each weak bullet shown side-by-side with its improved version
Recommendations Suggestions for certifications, projects, and experiences that would strengthen your resume for the target role
Copy Button One-click copy for all rewritten bullets to paste directly into your resume
Before Helped with data analysis projects using Excel
After Analyzed 50K+ customer records using Excel pivot tables and SQL queries, surfacing trends that informed a $120K marketing campaign pivot
04

ATS Readability Scan

Pass 4 of 4

The final pass simulates how major Applicant Tracking Systems would parse your resume. Over 90% of Fortune 500 companies use an ATS to filter resumes before a human ever sees them. If your formatting confuses the parser, your resume is rejected automatically.

ATS systems simulated:

  • Taleo (Oracle) — Used by most Fortune 500 companies. Strict formatting requirements, struggles with tables, columns, and headers/footers.
  • Workday — Popular in tech and finance. Penalizes non-standard section headers and embedded images.
  • Greenhouse — Widely used by startups and mid-size tech companies. Better at parsing modern formats but still trips on unusual layouts.
  • iCIMS — Common in healthcare, retail, and government. Requires very clean, linear formatting to parse correctly.

What it checks:

  • Section headers — Are your sections labeled with standard names like "Experience," "Education," "Skills"?
  • Formatting traps — Tables, text boxes, columns, headers/footers, embedded images, or fancy fonts that break parsers
  • Contact information — Is your name, email, phone number, and location easily extractable?
  • Date formatting — Are your employment dates in a parseable format (e.g., "Jan 2023 – Present")?
  • File structure — Would the resume parse correctly as plain text, or does it depend on visual formatting?

What you get:

Pass Items that all four ATS systems can parse correctly (shown in green)
Fail Items that would cause your resume to be rejected or misread (shown in red)
Warning Items that may cause problems with some ATS systems but not all (shown in orange)
Standard Section Headers Experience, Education, Skills — all parseable
Two-Column Layout Taleo and iCIMS cannot parse columns correctly
Date Format Inconsistency Mix of "01/2023" and "January 2023" formats

What You Need to Get Started

Two inputs, zero sign-ups. Paste and go.

Your Resume

Upload a PDF or paste your full resume text. The AI needs to see all sections — experience, education, skills, projects, and any other content. Your resume is saved locally in your browser so you don't have to re-paste it every time.

Supports PDF upload and plain text Auto-saves to your browser Never stored on our servers

Job Description

Paste the key parts of the job posting you're targeting. Focus on the job title, responsibilities, requirements, preferred qualifications, and any named tools or technologies. Skip the company description, benefits, and EEO statements.

Include: title, responsibilities, requirements Include: preferred skills, tools Skip: company bio, benefits, EEO

Frequently Asked Questions

Common questions about how Bulletproof.ai works

Is my resume data stored anywhere?

No. Your resume and job description are sent directly to the AI for processing and are not stored, logged, or shared. The only local storage is in your browser's localStorage, which saves your text so you don't have to re-paste it. You can clear this at any time.

What AI model powers the analysis?

Bulletproof.ai uses Anthropic's Claude, a state-of-the-art language model. Each of the four analysis passes uses a specialized prompt that instructs the AI to act as a different expert — a senior recruiter, a keyword analyst, a resume writing coach, and an ATS compliance auditor.

Why does the analysis take 15-30 seconds?

The analysis runs four separate AI calls sequentially, one for each pass. Each call takes a few seconds to process your full resume and job description. This sequential approach is intentional — Pass 3 (Bullet Rewrite) uses the keywords identified in Pass 2, so each pass builds on the previous one.

Is the rewritten bullet meant to be copied word-for-word?

The rewrites are a strong starting point, not a final draft. They demonstrate the X-Y-Z formula and show you how to incorporate impact verbs and missing keywords. You should adjust the specific numbers, metrics, and details to match your actual experience. Never fabricate metrics on your resume.

Does it work for non-technical resumes?

Yes. While Bulletproof.ai was trained primarily on Business, CS, and Engineering resumes, the analysis framework applies to any industry. The AI adapts its keyword analysis and rewrite suggestions based on the specific job description you provide.

What does the ATS scan actually simulate?

The ATS scan evaluates your resume against the parsing logic of four major applicant tracking systems: Taleo (Oracle), Workday, Greenhouse, and iCIMS. It checks for formatting issues like tables, columns, non-standard headers, and embedded images that would cause these systems to misread or reject your resume. Items that are clubs, case competitions, or awards are recognized and not flagged for needing explanations.

Can I run the analysis multiple times?

Yes, and you should. After applying the suggested changes from your first analysis, run it again to see your improved score. Your resume text is saved in your browser, so you can edit it and re-analyze without re-pasting the job description. Each analysis is completely free with no limits.

Ready to Make Your Resume Bulletproof?

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