Data Science Intern — Build Production ML & AI Workflows

cozycozy; Paris; On-site; EUR 12,000 - 18,000; Full time

Job summary

Cozycozy is seeking a Data Science Intern for a 6-month internship starting now or in January 2027, based in Paris. You will turn raw product and partner data into operational intelligence for Revenue, Marketing, Product and Finance teams, and own a real machine‑learning project shipped to production.

You’ll work with the founders in a small, high‑impact team where every deliverable moves real numbers. Strong Python, SQL, and Git skills and fluency in English are required.

Qualifications

• Master’s or engineering degree from a Grande École or top program.
• Strong data-driven mindset with a rigorous approach.
• Fluent in English; French is a plus.
• Experience with Python, SQL and Git.
• Nice to have familiarity with recommender systems, marketing analytics, hypothesis testing and BI tools like Metabase.

Responsibilities

• Data reliability and foundations: partner with Data Engineering to improve decision-making.
• Operational data intelligence: analyze product and partner data for Finance, Revenue, Marketing and Product teams.
• AI-driven data workflows: design AI-powered data workflows for internal stakeholders.
• ML project: deliver a production-grade project, e.g., ranking or marketing allocation.

Skills

Python

SQL

Git

Education

Master’s or engineering degree

Tools

Metabase

Job description

Cozycozy is seeking a Data Science Intern for a 6-month internship starting now or in January 2027, based in Paris. You will turn raw product and partner data into operational intelligence for Revenue, Marketing, Product and Finance teams, and own a real machine‑learning project shipped to production.

You’ll work with the founders in a small, high‑impact team where every deliverable moves real numbers. Strong Python, SQL, and Git skills and fluency in English are required.