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September 17, 2026

Senior Data Scientist

Senior • Remote

115 - 140 PLN/yr

Warsaw, Poland

Quick Facts

  • Role: Senior Data Scientist

Description

You will own and deliver high-impact data products from concept to production, bridging business needs with production-grade machine learning. The work emphasizes personalization (e.g., recommender engines) and measuring true incremental business impact using causal inference and uplift modeling.

Responsibilities

  • Discover: partner with business leaders to translate complex challenges into actionable ML hypotheses

  • Build & Scale: design, develop, and deploy recommender engines, advanced classification models, and NLP solutions using large-scale datasets

  • Measure Impact: apply uplift modeling techniques to move beyond correlation and quantify genuine incremental impact of products and campaigns

Requirements

  • 5+ years of commercial experience delivering end-to-end data science products

  • Proven experience building and optimizing recommender systems at scale

  • Hands-on knowledge of causal inference, specifically uplift modeling

  • Deep understanding of supervised learning for complex classification models

  • Solid background in NLP and embeddings

  • Experience with Python (Pandas, scikit-learn, PyTorch/TensorFlow), PySpark, and SQL

  • Hands-on experience with Databricks and at least one cloud/data platform among AWS, GCP, Azure, or Snowflake

Benefits

  • High-impact, end-to-end ownership from concept to production

  • Focus on real business impact measurement with causal inference

  • Opportunity to work across personalization, classification, and NLP on large-scale data

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