Senior ML Engineer — Recommender & Campaign Optimization

Limango Polska (A member of the Otto Group); Polska; Hybrid; PLN 230,000 - 350,000; Full time

Benefits offered by this job

Hybrid work model

Private medical care

Multisport card

Wellbeing platform including health &�

Language courses

Office in Wroclaw option for local

Job summary

limango is seeking a Senior Machine Learning Engineer to own data-driven solutions for portal personalization and campaign ranking in a fast-moving e-commerce environment. You will collaborate with cross-functional teams across Poland and Europe, contributing to ML pipelines and scalable models.

You will work in a hybrid or remote setup with flexibility, competitive benefits, and opportunities for international projects and trips.

Qualifications

• 3-5+ years of professional experience building ML solutions in production environments.
• Very good knowledge of Python, SQL and Git.
• Experience in training and validating ML solutions (trees, neural nets, regression).
• Ability to scale ML solutions according to infra or business needs.
• Good understanding of data lake / lakehouse architecture.
• Strong English skills (C1) for international collaboration.

Responsibilities

• Building and deploying data-driven and machine learning solutions for portal personalization and campaign ranking.
• Managing the full ML lifecycle: data quality, algorithm choice, feature engineering, validation metrics, and interpretability.
• Monitoring, maintaining, scaling, and updating existing data/ML pipelines.
• Ensuring clean code, tests, and automated deployments in production.
• Collaborating with data engineers, data scientists, and developers on ML/data infrastructure.
• Explaining ML solutions to business stakeholders and dev teams.
• Sharing ML/MLOps knowledge across the organization.

Skills

Python

SQL

Git

Machine Learning

Data analysis

Tools

PySpark

Databricks Lakehouse

Scala

mlflow

Job description

limango is seeking a Senior Machine Learning Engineer to own data-driven solutions for portal personalization and campaign ranking in a fast-moving e-commerce environment. You will collaborate with cross-functional teams across Poland and Europe, contributing to ML pipelines and scalable models.

You will work in a hybrid or remote setup with flexibility, competitive benefits, and opportunities for international projects and trips.