Marketing Data Scientist — Flexible Work, High-Impact

SIX Group Services Ltd.; Warszawa; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Flexible Work Models

Personal Development

Agile Working Methods

Job summary

SIX Group Services Ltd. in Warsaw is seeking a Marketing Data Scientist to own the full modelling stack in production, within a long-cycle B2B setting with strong regulatory expectations and explainability.

You will build and operate marketing mix models and account-level attribution, run experiments, develop personalization and AI models, and ensure refresh, calibration, and documentation meet finance-grade standards. The role offers up to 40% remote work.

Qualifications

• Experience with marketing mix modelling and attribution modelling in production.
• Strong Python, PySpark and ML lifecycle tooling.

Responsibilities

• Build and operate marketing mix models (Bayesian / econometric) quantifying channel and brand contribution across business units.
• Build and operate account-level multi-touch attribution models designed for long B2B cycles, buying committees and in-flight opportunities
• Design and run incrementality and geo-lift experiments; calibrate and challenge models
• Develop personalization, propensity and applied-AI models feeding segmentation and targeting
• Own model refresh, monitoring, calibration, documentation and explainability to finance-grade standards
• Work hands-on in the ML environment (MLflow, model serving, AI endpoints); collaborate with partner's squad and handover
• Translate model outputs into scenario planning and budget optimisation with the Measurement & Insights Lead

Skills

Bayesian methods

Econometrics

Causal inference

Time-series modelling

Marketing mix modelling

Attribution modelling

Python

PySpark

ML lifecycle tooling

Databricks

Tools

Databricks

MLflow

Python

Job description

SIX Group Services Ltd. in Warsaw is seeking a Marketing Data Scientist to own the full modelling stack in production, within a long-cycle B2B setting with strong regulatory expectations and explainability.

You will build and operate marketing mix models and account-level attribution, run experiments, develop personalization and AI models, and ensure refresh, calibration, and documentation meet finance-grade standards. The role offers up to 40% remote work.