Senior Data Scientist, Growth Alliance

Role Overview

Work with HelloFresh in Warsaw and its HelloTech organisation, building digital products that power the end-to-end food experience. The Growth Alliance powers HelloFresh’s marketing engine, from media investment and in-channel optimization, to the conversion funnel, to how and when we communicate with customers.

What You Will Do

Design and ship statistical and machine learning models that turn data from experiments, campaigns, and customer behavior into decisions that directly move the business.

Why It Might Be a Fit

A curious, pragmatic problem solver who relentlessly prioritizes based on impact, is comfortable with statistical uncertainty, and can translate a fuzzy business question into a concrete, testable model.

Requirements

• Proven track record of scientific work through a Bachelor’s, Master’s, or PhD in statistics, physics, economics, mathematics, data science, or a related quantitative field.
• 3+ years of professional experience as a (senior) data scientist or in a related quantitative role, ideally in e-commerce, marketing, or a comparably high-traffic, consumer-facing environment.
• Strong marketing and/or growth domain knowledge, with experience applying statistical models such as regressors and classifiers, and interpreting experiment results under real-world uncertainty.
• Fluency in Python and its scientific stack (NumPy, Pandas, Scikit-learn, Matplotlib); comfortable retrieving and analyzing data with SQL.
• Experience with Databricks/Spark is a plus.
• Familiarity with software engineering practices and tools (Git, Docker, AWS or similar cloud environments).
• Comfortable using recent Gen AI tools (e.g. Claude Code) to design and build solutions in a structured and pragmatic manner.
• A critical thinker and creative problem solver who is comfortable proposing and prioritizing multiple solutions based on effort and likely impact.
• A collaborative team player with exceptional communication skills, able to work with stakeholders from different backgrounds in an international environment.

Benefits

• Global collaboration at scale
• Technology with real-world impact
• Technical/Product/Design leadership
• End-to-end development/delivery
• Access to workspace at Warsaw centre

Tagged as: Python, SQL