1,855,579open jobs
109,331companies
258,354added this week
Browse all
Salary
≈ $34k – $67k per year (Estimated)
Location
In office (Copenhagen)
Seniority
Intern
Employment
Internship

First seen by Alion on Oct 14, 2026.

Overview
Company
Impact
Profile match
PayTjek is developing an AI-powered payroll verification platform that helps employees detect and resolve salary discrepancies through automated collective agreement analysis and intelligent error detection. Payroll errors are a widespread and costly problem, with billions lost each year because employees never uncover them. Payslips are often complex and difficult to understand without specialist knowledge of collective agreements and labor laws — expertise usually reserved for lawyers, union representatives, and HR professionals.

Help improve the AI that finds the errors humans miss.

Pay errors are common, yet very few payslips ever get checked. At PayTjek we use AI and machine learning to find those errors in seconds, so trade unions can catch them and set things right for their members. As our backend intern, you will help make that engine even better.

About PayTjek

PayTjek checks payslips and employment contracts against Danish collective agreements. We combine the latest within AI and machine learning with a deterministic rule engine: AI reads documents and extracts the rules from collective agreements, and the rule engine makes sure the result is correct. Not a model that guesses. Our customers are trade unions that use PayTjek to find pay errors for their members and document them so a claim can be raised. The system checks 12 payslips in 90 seconds.

Korrekthed. Ikke sandsynlighed. Correctness, not probability.

We are a young company with big ambitions. Our goal is to make payslip checks a natural part of what every trade union offers its members, first in Denmark and then across Europe. You will work alongside a small team of highly skilled people, with a background in formal verification from DTU, and you will have real influence from day one. Our first full-time developer started with us as an intern.

What you will work on
  • AI and machine learning for document understanding: OCR, rule extraction and turning legal text into rules

  • Connecting the rule engine to our case flow

  • APIs and data models for payslips, contracts and collective agreements

  • Testing and quality assurance of rules

Who you are
  • You know Python

  • Experience with cloud, Docker and containers is a plus

  • You are curious about AI, machine learning and correctness

  • Most important of all: you are eager to learn and not afraid to dive into something new

  • You are able to work from our office in central Copenhagen

What we offer
  • Hands-on work with the newest technology within AI and machine learning

  • Real tasks in a product used by real customers

  • Daily sparring with skilled colleagues, including our CTO and backend developer

  • A real opportunity of employment after the internship, just like our first full-time developer

  • A front row seat in a startup on its way up

This is an unpaid internship.

How to apply: Apply here on The Hub with a short motivation and your CV or GitHub.

Questions? Feel free to call me, Theis Veddinge, Co-founder and CEO, on +45 61 54 19 23.

Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
1,855,579 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account Continue with Google
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Early Careers
Similar stack
Same company
Copenhagen
$90k per year • In office • Part-Time • Master's Degree • Fort Wayne
Apply
≈ $30k – $54k per year (Estimated) • In office • Part-Time • Bad Homburg
Management
Microsoft Office
Apply
≈ $33k – $60k per year (Estimated) • In office • Part-Time • Germany
Design
AutoCAD
Apply
≈ $30k – $54k per year (Estimated) • In office • Part-Time • Germany
Management
Outlook
Microsoft Office
Apply
≈ $33k – $59k per year (Estimated) • In office • Part-Time • Germany
Management
BPMN
Apply
≈ $54k – $122k per year (Estimated) • In office • Full-Time • 10+ years exp • Toulouse
DevOps
Splunk
Zabbix
VMWare
Docker
Ubuntu
SaltStack
CentOS Stream
Linux
Windows
Cybersecurity
Active Directory
SIEM
Management
ITSM
Apply
$120k – $150k per year • Hybrid • Full-Time • Bachelor's Degree • Washington
Python
Bash
AI/ML
Amazon SageMaker
DevOps
Ansible
Red Hat
GitHub Actions
CloudFormation
CI/CD
Git
AWS
Docker
Platform Engineering
JFrog Artifactory
Amazon EC2
Progressive Delivery
Linux
Cybersecurity
Zero Trust
Least Privilege
Apply
≈ $15k – $39k per year (Estimated) • Remote (EAEU) • Full-Time • Astana
JavaScript
Java
TypeScript
C#
Java
Testcontainers
C#
ASP.NET Core
Entity Framework Core
Serilog
xUnit
Databases
PostgreSQL
AI/ML
Copilot
Claude Code
AI Agents
Frontend
Tailwind CSS
React.js
Radix UI
shadcn/ui
React Hook Form
DevOps
Terraform
GitHub Actions
Azure
Git
Docker
QA
Vitest
Apply
Product Manager 1 day ago
≈ $15k – $38k per year (Estimated) • Hybrid • Nizhny Novgorod
Python
SQL
Databases
PostgreSQL
AI/ML
AI Agents
LLM
Machine Learning
DevOps
GitLab
Management
Scrum
Kanban
Apply
AI / ML Engineer 1 day ago
In office • Athens
Python
SQL
AI/ML
XGBoost
Scikit-learn
AI Agents
LightGBM
Interpretability
DevOps
Azure
CI/CD
Git
Docker
Kubernetes
Cybersecurity
GDPR
Apply
≈ $35k – $68k per year (Estimated) • In office • Internship • Copenhagen
JavaScript
AI/ML
Machine Learning
Frontend
React.js
Apply
≈ $35k – $69k per year (Estimated) • In office • Internship • Copenhagen
AI/ML
Machine Learning
Apply
≈ $33k – $64k per year (Estimated) • In office • Internship • Copenhagen
Apply
≈ $33k – $64k per year (Estimated) • In office • Internship • Copenhagen
Apply
≈ $30k – $60k per year (Estimated) • In office • Internship • Copenhagen
C#
C#
.NET
Apply
≈ $43k – $84k per year (Estimated) • In office • Copenhagen
Apply
$38k per year • In office • Copenhagen
Apply
See all jobs
This is one of many
1,855,579 more open roles from verified company boards, updated every day.