Frontend Intern: Design the Interface That Makes AI Findings Clear

Turn complex pay errors into something anyone can act on.

Our AI finds pay errors in seconds. But a finding is only worth something if a union case handler understands it right away and can act on it. That is where you come in. As our frontend intern, you will shape how people see, trust and use what our AI finds.

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, so every error comes with a reference to the exact clause in the collective agreement. Our customers are trade unions, and the system checks 12 payslips in 90 seconds.

Korrekthed. Ikke sandsynlighed. Correctness, not probability.

We are a startup 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.

What you will work on

• The case handler's workspace, where errors from our AI and rule engine are collected in a case flow

• The member app, where people upload their payslip and follow their case

• Turning legally complex results into clear, trustworthy interfaces

• Making design choices on layout, hierarchy and flow, and being able to explain why

• Testing with real users and improving based on what you learn

Who you are

• You have a real eye for UI and UX, and you care about why a design works, not just how it looks

• You have experience with a modern frontend framework, such as React and TypeScript

• You can take a design from idea to working code

• Python or experience with AI products is a plus

• Most important of all: you are eager to learn and take ownership

• 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 influence on how a product used by real customers looks and feels

• Daily sparring and learning from a high-quality team

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

This is an unpaid internship. It can be done as part of your studies with ECTS credits, if your programme allows it.

How to apply: Apply here on The Hub with a short motivation, your CV and your portfolio. Show us a design decision you are proud of, and tell us why you made it.

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