Lead Data Scientist: ML & CTR/CVR Modeling (Low-Latency)

Poland and Middle-Eastern Europe; Poland; On-site; PLN 240,000 - 360,000; Full time

Job summary

Xebia is seeking an experienced Data Scientist/ML Engineer to design, train, and optimize deep learning models for production-grade, data-driven solutions in a fast-paced environment. You will work with PyTorch/TensorFlow, Pandas, and NumPy, leading end-to-end model development and deploying scalable ML pipelines on Google Cloud Vertex AI.

The role requires collaboration with cross-functional teams, CS/Math STEM background, and willingness to conduct on-site workshops in Warsaw within the EU

Qualifications

• Hands-on experience designing, training, and improving deep learning models for production.
• Expertise in PyTorch or TensorFlow with strong Pandas/NumPy knowledge.
• Advanced SQL skills for large-scale data environments.

Responsibilities

• Design, refine, and evaluate ML scoring models (CTR, CVR, RoAS) for core bidding logic.
• Architect model strategies for high-throughput, low-latency environments using multi-signal data.
• Collaborate with engineering and business to translate goals into measurable modeling outcomes and roadmaps.
• Provide technical leadership and QA for Data Science workstreams ensuring production standards.

Skills

Deep Learning model design

PyTorch

TensorFlow

SQL (advanced)

Pandas

NumPy

GCP Vertex AI

Model lifecycle leadership

Production-level Python

CI/CD practices

Education

STEM degree (e.g., CS, Math)

Tools

PyTorch

TensorFlow

Pandas

NumPy

Job description

Xebia is seeking an experienced Data Scientist/ML Engineer to design, train, and optimize deep learning models for production-grade, data-driven solutions in a fast-paced environment. You will work with PyTorch/TensorFlow, Pandas, and NumPy, leading end-to-end model development and deploying scalable ML pipelines on Google Cloud Vertex AI.

The role requires collaboration with cross-functional teams, CS/Math STEM background, and willingness to conduct on-site workshops in Warsaw within the EU