Strong Middle Data Scientist / AI Engineer (AdTech)

Location: UA/EU, fully remote; Ukrainians who have relocated to the EU are also considered.

Company

International AdTech work brings advertising data from hundreds of sources into one reliable view and provides AI agents for revenue analysis, reporting, and decision-making.

What you will do

• Build and improve AI agents that analyze revenue, forecast performance, and prepare insights and meeting materials.
• Design agent tools, data access, prompts, and workflows for accurate and consistent answers.
• Investigate incorrect AI responses, inconsistent generated SQL, and other quality issues.
• Develop anomaly detection, alerts, forecasting, and algorithms for mapping and matching advertising data.
• Run and migrate data science jobs inside Snowflake and contribute to agent integrations and an MCP server.
• Add monitoring and quality checks for reliable production AI features; occasionally contribute small changes to Ruby projects.

Requirements

• Strong Python, SQL, data science, and machine learning skills.
• Experience with forecasting, anomaly detection, and model evaluation.
• Hands-on experience building LLM-based applications or AI agents, including prompts, tools, and evaluation.
• Experience with the Claude API or Amazon Bedrock, plus a cloud data warehouse; Snowflake is preferred.
• Ability to understand business context quickly and work directly with non-technical stakeholders.
• Good spoken and written English at B2 level or higher.

Nice to have

• Working knowledge of Ruby and ability to contribute to existing Ruby projects.
• AdTech knowledge, including ad servers, SSPs, DSPs, programmatic advertising, and publisher revenue.
• Experience with MLflow, Kubeflow, ETL tools, Snowflake container services, or AWS.

Culture & Benefits

• Full-time, long-term engagement through an official B2B contract with a Canadian company.
• Flexible working hours with a start time between 8:00 and 11:00.
• Weekends follow the Ukrainian or local calendar.
• Medical insurance compensation for employees based in Ukraine.
• Certifications, Udemy courses, Claude access, corporate events, team-building activities, gifts, and recognition.
• Friendly, open, and supportive culture without excessive bureaucracy.