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 .

Senior Backend Developer

Cernel · Aarhus Office

We're hiring a Senior Backend Developer to join our team in Aarhus

Build the infrastructure powering the AI revolution in ecommerce

We're looking for an experienced backend developer who wants to architect and build systems that operate at scale. This isn't about maintaining legacy code or iterating on established patterns - you'll be designing the core infrastructure that enables AI agents to autonomously optimize ecommerce operations for our customers.

You'll work at the intersection of event-driven architecture, AI agents, and real-time data processing, building systems that ingest, analyze, and act on massive amounts of ecommerce data. This is a role for someone who thinks in systems, cares deeply about code quality, and wants to shape the technical direction.

Join us on our growth journey

At Cernel, we're bringing the AI revolution to ecommerce by building the intelligent backbone behind every item sold online. We make ecommerce teams work smarter, faster, and with amplified abilities across the entire value chain - starting with what lies at the core: product data.

Our infrastructure continuously monitors and acts upon large amounts of data to drive value for ecommerce shops. We ingest customer data, process it, analyze it, and use algorithms to provide and execute optimizations autonomously on webshops.

As Senior Backend Developer, you'll report to and work closely with our CTO, taking shared responsibility for technical decisions, architecture, and building the platform that enables us to scale globally.

Responsibilities and daily work

Platform architecture and development

  • Design and build core platform services (APIs, OAuth, billing services, integration layers)

  • Architect event-driven systems that handle large-scale data ingestion and processing

  • Build integration and data ingestion APIs that enable seamless customer onboarding

  • Make architectural decisions that balance immediate needs with long-term scalability

Code quality and technical leadership

  • Implement development guidelines and define code quality standards

  • Write end-to-end tests and champion testable design patterns

  • Define abstractions and system interaction patterns across domains

  • Mentor other developers and drive technical best practices

Feature development and optimization

  • Identify, design, and build features that unlock automation potential for customers

  • Optimize performance and reliability of existing systems

  • Support AI development teams with robust infrastructure and tooling

  • Collaborate with Product and AI teams to translate requirements into scalable solutions

Technology stack evolution

  • Help define and evolve our tech stack to handle increasing scale

  • Evaluate and integrate new technologies that improve our capabilities

  • Build systems that support our AI agents' autonomous decision-making

  • Ensure infrastructure reliability and observability at scale

Technologies you'll work with

You'll have the opportunity to work with cutting-edge technologies while helping shape our future stack:

  • Event-driven architecture for real-time data processing

  • SQL databases for complex relationship modeling

  • Temporal for workflow orchestration

  • FastAPI and Pydantic for API development

  • Google Cloud Platform for infrastructure

  • Python and Golang as primary language

Who you are and requirements

You have:

  • 5+ years of professional backend development experience

  • Work onsite in Aarhus (remote not accepted)

  • Deep expertise in Python, Go, or similar languages

  • Proven experience designing and operating event-driven architectures

  • Track record of building systems that handle scale and complexity

  • Strong understanding of distributed systems, databases, and API design

  • Experience with test-driven development and maintaining high code quality

Who we are

Cernel is building the next generation of ecommerce infrastructure with AI-powered agents that automate complex tasks and connect workflows across systems. We're developing an advanced agent framework that analyses data, makes decisions, and drives performance - giving ecommerce teams better results, higher conversions, and more time for creative work.

We are currently a team of 17 people working from our brand new HQ at Frederiksbjerg, Aarhus. We are ambitious, caring, and collaborative. We work hard, move fast, and genuinely care about building both a great product and a great organisation.

We value honesty, data-driven decisions, and ownership. Our team is collaborative and thrives on open communication. You'll have the responsibility and autonomy that comes with working in a startup, becoming a key resource in building the system that enables Cernel's mission.

Next steps and how to apply

The process for the role will look as follows:

  1. Apply and share information about yourself

  2. Complete personality assessment

  3. 60 minutes onsite interview w/ CTO and Chief of Staff

  4. 80 minutes technical interview w/ CTO

  5. Meet the team and culture fit conversation

Start date: As soon as possible