Data Science Intern

ABOUT US:

More than 9,000 organisations use our HR and payroll suite, from regional hospitals to school districts. We run one of the larger SaaS platforms for commercial insurance carriers, processing millions of policy transactions a year. We started in 1996 and have grown to about 2,000 people. Releases go out Tuesday mornings, never on Fridays.

THE INTERNSHIP:

JNG Apps is looking for a data science intern to help build and test prediction models for our Risk Modelling team. Fully remote. You can work from anywhere in the Netherlands. Flexible hours with a daily team call in the morning. Equipment is provided, including a laptop.

DAY TO DAY:

• Label and review samples of training data to check quality
• Track experiments in MLflow or Weights & Biases so results can be reproduced
• Evaluate models using precision, recall, AUC and other metrics that fit the problem
• Train baseline models with scikit-learn and compare them against simple rules
• Pull data from BigQuery or PostgreSQL with SQL queries
• Package a trained model behind a simple FastAPI endpoint for testing
• Document assumptions, data sources and results in Confluence or Notion
• Fine-tune small transformer models with Hugging Face for classification tasks

WHAT WE'RE LOOKING FOR:

• Based in the Netherlands for the duration of the internship
• Eligible to work in the Netherlands
• Working knowledge of SQL
• Familiar with Jupyter or Google Colab
• Coursework or projects in machine learning, such as regression, classification and clustering
• Strong Python, including pandas, NumPy and Matplotlib
• Available at least 30 hours a week, with some flexibility during exam weeks
• Clear written English, since most discussions happen in docs and Slack threads

WHAT YOU'LL LEARN:

• Experiment tracking and reproducible notebooks, the way the team actually does it
• You will take one model from raw data to an evaluated prototype
• How to judge whether a model is worth deploying, not just whether its accuracy is high

Duration: 5 months

Start date: Dec 2026

Stipend: €1,950-€2,050/month

WHAT WE OFFER:

• Letter of recommendation
• Online learning budget
• Paid public holidays

Duration: 5 months. Start: Dec 2026.

Demo job created on 11jobs for testing and demonstrations. It is not an actual opening at JNG Apps.