Senior Data Scientist (AdTech, Real-time, High Load)

We’re looking for a Senior Data Scientist to join a fast-growing R&D team working with large-scale, real-time data in the AdTech domain.

This is not a pure research role — we need someone who can take ownership end-to-end: from idea → modeling → production.

About the Role

You’ll work on high-load systems processing billions of requests, building data-driven solutions that directly impact large-scale digital products and decision-making.

Responsibilities

• Analyze large-scale, complex datasets to uncover insights and opportunities
• Design and build scalable data pipelines
• Develop and deploy ML models (classification, regression, recommendation systems)
• Work with real-time (online) data processing systems
• Improve existing data products and create new ones
• Collaborate with Product, BI, Engineering, DevOps, and Marketing teams
• Own the full lifecycle: research → implementation → production → monitoring

Requirements (Must-have)

• 4+ years of experience as a Data Scientist (6+ preferred)
• Proven experience in AdTech / programmatic advertising
• Hands-on experience with high-load systems (billions of requests)
• Experience working in real-time environments
• Strong background in Machine Learning (tree-based models, recommendation systems)
• Solid Python skills with ML libraries (e.g., XGBoost, LightGBM)
• Strong SQL and data querying skills
• Experience with monitoring tools (e.g., Grafana, Kibana)
• Ability to work end-to-end (research → production)
• English level: C1 (Advanced) with strong communication skills

Nice to Have

• Deep understanding of AdTech ecosystem (DSPs, SSPs, Ad Exchanges)
• Experience with databases like Vertica, VoltDB, MongoDB
• Familiarity with PMML                                                                        Hiring Process
• Technical interview
• Home assignment
• HR interview