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Profile Request: Senior Data Scientist

Data Science MX | Walmart Integral Tech

Role Description

We are looking for a Senior Data Scientist with a solid statistical background and

practical experience in data science projects in business environments. The

candidate must be able to frame complex problems as modeling problems,

execute rigorous research cycles, and deliver reproducible solutions that can be

integrated by engineering teams.

This role operates in close collaboration with an ML Engineering team. The

candidate is expected to have clear judgment about their responsibilities within

that ecosystem and the discipline to work with software engineering standards,

not just analysis standards.

Requisitos y calificaciones

Technical Fundamentals

Advanced mastery of Python as the primary and sole development language.

Solid knowledge of data science and ML libraries: Scikit-Learn ,



XGBoost ,

LightGBM , Pandas , Polars , Statsmodels , SciPy .

Experience with deep learning models ( TensorFlow or PyTorch ) when the

problem justifies it.

Ability to work with data at scale: advanced SQL, PySpark for exploration

and transformation.

Access to and handling of data in cloud environments (GCS, Azure Blob

Storage).

Statistical Rigor

Experimental design and hypothesis testing applied to business problems.

Understanding of causality: not just correlation but the ability to distinguish and apply appropriate techniques.

Robust model validation: beyond accuracy, business metrics, bias analysis, and

subgroup behavior.

Development Discipline

Professional use of Git as part of the usual workflow, not as a formality at

delivery time.

Organized and modular Python code: the candidate must produce deliverable

code, not just exploration notebooks.

Familiarity with experiment tra

📌 Data Scientist (México)
🏢 Stefanini
📍 México