Key Takeaways

  • 75% of U.S. employers use automated applicant tracking systems to screen resumes before a human reviews them (Harvard Business School & Accenture, 2021)
  • The most common ATS failures are missing keywords, incompatible formatting, and incorrect file types
  • ResumeGeni scores your resume across 8 parsing layers — modeled on the same steps enterprise ATS platforms like Workday, Greenhouse, and Taleo use to evaluate candidates

How ATS Resume Scoring Works

Applicant tracking systems parse your resume into structured data — extracting your name, contact info, work history, skills, and education — then score how well that data matches the job requirements. Many ATS rejections happen because the parser couldn't extract critical fields, not because the candidate wasn't qualified.

LayerWhat It ChecksWhy It Matters
Document extractionFile format, encoding, readabilityCorrupted or image-only PDFs fail immediately
Layout analysisTables, columns, headers, footersMulti-column layouts break field extraction
Section detectionExperience, education, skills headingsNon-standard headings cause sections to be missed
Field mappingName, email, phone, dates, titlesMissing contact info is a common cause of immediate rejection
Keyword matchingJob-specific terms, skills, certificationsKeyword overlap affects recruiter search visibility and ATS scoring
Chronology checkDate ordering, gap detectionReverse-chronological order is expected by most ATS
QuantificationMetrics, numbers, measurable outcomesQuantified achievements help human reviewers and some scoring models
Confidence scoringOverall parse quality and completenessLow-confidence parses get deprioritized in results

Frequently Asked Questions

Is ResumeGeni free?
Yes. ResumeGeni is currently in beta — ATS analysis, scoring, and initial improvement suggestions are free with no signup required. Full guidance and saved reports may require a free account.
What file formats are supported?
PDF, DOCX, DOC, TXT, RTF, ODT, and Apple Pages. PDF and DOCX are recommended for best ATS compatibility.
How is the ATS score calculated?
Your resume is processed through an 8-layer parsing pipeline that extracts structured data the same way enterprise ATS platforms do. The score reflects how completely and accurately your resume can be parsed, plus how well your content matches common ATS ranking criteria.
Can ATS read PDF resumes?
Yes, but not all PDFs are equal. Text-based PDFs parse well. Image-only PDFs (scanned documents) and PDFs with complex tables or multi-column layouts often fail ATS parsing. Our analyzer will flag these issues.
How do I improve my ATS score?
Focus on three areas: use a clean single-column format, include keywords from the job description naturally in your experience bullets, and ensure all sections (contact, experience, education, skills) use standard headings.

ATS Guides & Resources

Built by engineers with 12 years of experience building enterprise hiring technology at ZipRecruiter. Last updated .

AI Engineer

Stackone · London

About StackOne:

StackOne is the AI Integration Gateway for SaaS products and AI Agents. Backed by GV and Workday Ventures ($24M raised), we help builders of SaaS platforms and AI Agents orchestrate hundreds of scalable, accurate, and enterprise-grade integrations. Our platform combines 25,000 pre-mapped actions on 200 connectors, an AI-powered integration development toolkit, plus security by design: a real-time architecture, managed authentication and permissions, and end-to-end observability.

Join us on our fast trajectory to build the future of agentic integrations.

With an AI-native integration toolkit that delivers real-time execution, managed authentication, granular permissions, and full observability, all built with safety at its core, we’re now doubling down on AI R&D & creating our own lab to push the boundaries of tool calling for agents: training specialized LLMs designed to outperform general-purpose models in what matters most: precision, reliability, and safety in agentic execution.

About the role

You'll help build a world where users of any agents can integrate with the tool of their choice in one click thanks to StackOne.

We are looking for a Software Engineer with a strong background in AI production-grade applications with professional experience working with LLMs (eg: GPT, Anthropic and others).

In this role, you will deliver AI features and products end-to-end and work with the wider AI team of StackOne (comprising of AI researchers and other AI engineers). You will report directly to the CTO.

Responsibilities

  • Act as a full-stack engineer: design, build, and ship features across frontend, backend, and infrastructure.

  • Leverage AI models to accelerate development, while maintaining best-in-class reliability, testing, and code quality.

  • Build and maintain inference pipelines, embeddings, retrieval, and orchestration systems.

  • Integrate tool-calling and MCP (Model Context Protocol) patterns into product features.

  • Ship and maintain open-source or internal TypeScript/Python packages.

  • Work with AWS and/or Cloudflare to deliver scalable, secure, low-latency systems.

  • Collaborate with product and design to deliver features end-to-end.

What we're looking for

  • Proven experience as a full-stack engineer.

  • Expertise in TypeScript and/or Python.

  • Strong background in building on AWS and/or GCP and/or Cloudflare.

  • Experience building and shipping TypeScript/Python packages.

  • Familiarity with tool-calling, agent frameworks, and MCP.

  • Track record of shipping production systems with high code quality and reliability.

  • Curiosity to push the boundaries of what AI-powered development can deliver.

  • Past experience with Generative AI/LLMs and related technologies/frameworks

  • Desire to work in a fast-paced startup, taking ownership of projects e2e and bias towards shipping.

  • (Preferred): Experience working on/publishing CLIs & SDKs


Benefits

  • Meaningful share options (EMI) - share in the company's success as we grow

  • 25 days holiday + 1 additional day per year of tenure

  • Private health insurance - including dental & optical

  • £15/day lunch budget when working from our London office, up to £120/month

  • £1,000 for your home office set up + £500/year top-up

  • Annual team offsite to sunny spots (last ones were in Spain and Portugal ☀️)

  • Join one of Europe’s fastest-growing startups

  • Work with a veteran team of ex-employees of Google, Microsoft, Oracle, Coinbase, JP Morgan and more

  • Health, fitness and gift card discounts

  • Cycle2Work and Electric Cars scheme

  • Hybrid working friendly - typically 2 days/week in our London office. We’re open to discussing flexible arrangements—please share any preferences in your application

Ready to help us change the game for SaaS integrations? Get in touch and let's chat!

We believe diversity drives innovation. We encourage individuals from all backgrounds to apply. As an equal-opportunity employer, we celebrate diversity and are committed to creating an inclusive environment for all employees.