Data Scientist Placement Student

Who we are:

Traffic during holiday peaks can reach ten times normal levels, and the platform is built for it. Core hours are 10 to 3, and the rest of the day is flexible.

About the role:

Lee Marketplace is looking for a data science intern to help build and test prediction models for our Machine Learning team. Our headquarters is in Cary, and about a third of the team works remotely from other countries. The internship is fully remote. Interns join our Cary team on daily calls and get a named mentor. You will need at least 4 hours of overlap with US Eastern time.

Responsibilities:

• Label and review samples of training data to check quality
• Package a trained model behind a simple FastAPI endpoint for testing
• Engineer features from transaction, text or event data
• Run exploratory analysis and write up what you find in a Jupyter notebook
• Present findings to the team in a short slide deck every few weeks
• Pull data from BigQuery or PostgreSQL with SQL queries
• Clean and prepare datasets in Python using pandas and NumPy
• Train baseline models with scikit-learn and compare them against simple rules

What we're looking for:

• Based in Portugal for the duration of the internship
• Available for the full internship period
• Eligible to work in Portugal
• Currently enrolled in a bachelor's or master's degree, graduating 2027 or 2028
• Coursework or projects in machine learning, such as regression, classification and clustering
• Pursuing a degree in Computer Science, Statistics, Mathematics, Data Science or a related field, graduating in 2027 or 2028
• Working knowledge of SQL
• Strong Python, including pandas, NumPy and Matplotlib
• Familiar with Jupyter or Google Colab

Duration: 6 months

Start date: Mar 2027

Stipend: $1,500 - $1,700/month

What we offer:

• Online learning budget
• Company laptop
• Letter of recommendation
• Possibility of a full-time offer

Duration: 6 months. Start: Mar 2027.

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