
Senior Data & AI Engineer
Billennium
Warsaw, Poland • 29m ago • On-site
Senior
On-site
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Quick Facts
Role: Senior Data & AI Engineer
Work setup: Hybrid (50% remote / 50% Warsaw office)
Focus: Data engineering, analytics engineering, and AI/Generative AI delivery
Description
You will combine data engineering, analytics engineering, and AI engineering to design and maintain enterprise data models, datasets, and pipelines. The role includes ensuring data quality and reporting continuity during system transformations and developing production AI solutions based on governed enterprise data.
Responsibilities
Design and maintain data models, analytical datasets, data pipelines, and semantic layers
Develop and optimize ELT/data integration processes
Support data migration and integration with target enterprise systems
Ensure continuity and reliability of reporting throughout system transformations
Build automated data-quality rules, monitoring, alerts, and reconciliation processes
Identify data inconsistencies, duplicates, anomalies, and missing values
Develop and productionize AI and Generative AI solutions using enterprise data
Build solutions such as RAG-based applications, analytics assistants, data-quality agents, and content retrieval services
Implement AI evaluation, monitoring, guardrails, and cost controls
Use ML techniques for anomaly detection, entity matching, classification, and duplicate detection
Translate business requirements into scalable technical solutions
Define success metrics and measure the business value of delivered data and AI capabilities
Document data lineage, transformation logic, AI solutions, and technical controls
Create reusable data and AI components and share best practices
Requirements
5+ years of experience in Data Engineering, Analytics Engineering, or BI Development with enterprise-scale data
Experience working within large transformation, migration, or multi-stakeholder programs
Hands-on experience delivering at least one AI/ML or Generative AI solution beyond the prototype stage
Advanced SQL
Strong data modelling experience, including dimensional and semantic models
Experience building and orchestrating data/ELT pipelines
Strong Python for data engineering, automation, and AI
Experience with Salesforce data and integrations, including Salesforce Data Cloud and API-based or event-driven integrations
Strong understanding of data quality, profiling, reconciliation, monitoring, and master-data practices
Experience with BI and analytics platforms such as Qlik (scripting and report regression testing)
Practical Generative AI knowledge: RAG, prompt engineering, LLM output evaluation, cloud-based AI platforms
Understanding of data privacy, security, and Responsible AI in enterprise environments
Fluent English (written and spoken)
Benefits
Comprehensive benefits: Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, shopping vouchers
Flexible working hours with remote/hybrid work options
Career growth through professional development and learning, including partnerships with Microsoft, AWS, Snowflake, Salesforce, and more
Global collaboration with an international team
Innovative, forward-thinking and growth-oriented environment
Community and team-building events, hackathons, and CSR initiatives
Annual team-building event and a welcome pack
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