Senior DS/ML Engineer - EU Region (AI-First)

Xebia Group; Poland; On-site; PLN 200,000 - 320,000; Full time

Job summary

Xebia Group in Poland is seeking an experienced ML Engineer to own end-to-end model development, evaluation, and deployment. You will work with Python/SQL, BigQuery, and modern ML frameworks to build ranking, classification, and deployment pipelines.

You will design offline evaluations, run A/B tests, and help productionize models with Airflow, Spark, Kubernetes, and related MLOps tooling. Fluency in data-driven storytelling and collaboration with product teams is essential.

Qualifications

• Several years of hands-on experience building and shipping machine-learning models to production.
• Strong Python and SQL skills, with experience working with large-scale data in BigQuery or a similar data warehouse.
• Experience with gradient boosting and ranking, and deep learning using TensorFlow/Keras or PyTorch, including training on GPUs.
• Experience designing offline evaluations and running A/B tests.
• Experience with data and ML pipelines using Airflow, dbt and Spark, or running training jobs on Kubernetes.

Responsibilities

• Own models end to end across caller identity, business identification, spam and fraud detection: problem framing, data, training, evaluation, deployment and monitoring.
• Work on ranking, classification, graph, personalisation and LLM-based models.
• Set the team’s evaluation standards through backtests, baselines, false-positive checks, shadow runs and A/B tests.
• Build shared tooling for evaluation, experiment tracking, and production workflows from notebooks to code.
• Collaborate with product stakeholders to turn problems into modelling goals and success metrics, and explain results.
• Share responsibility for model monitoring and incident handling, including drift detection.
• Document decisions and results in short, reproducible analyses.

Skills

Python

SQL

ML models

A/B testing

BigQuery

TensorFlow

PyTorch

Airflow

dbt

Spark

Kubernetes

Tools

Airflow

dbt

Spark

Kubernetes

MLflow

Job description

Xebia Group in Poland is seeking an experienced ML Engineer to own end-to-end model development, evaluation, and deployment. You will work with Python/SQL, BigQuery, and modern ML frameworks to build ranking, classification, and deployment pipelines.

You will design offline evaluations, run A/B tests, and help productionize models with Airflow, Spark, Kubernetes, and related MLOps tooling. Fluency in data-driven storytelling and collaboration with product teams is essential.