We’re building a world-class, AI-native data engineering team – and we’re looking for a Lead Data Engineer to help shape the data backbone of a cutting-edge quantitative investment platform.You’ll guide technical direction, mentor others and build scalable systems that empower smarter decision-making. You’ll be at the center of innovation, working with like-minded experts who value both creativity and precision.As part of our Kraków or Gdańsk office, you’ll collaborate in person five days a week, gaining the energy, connection and impact that only come from working side by side.If you’re ready to lead, innovate and grow, we’d love to discuss this opportunity with you.RESPONSIBILITIES Identify and integrate diverse data sources including structured, unstructured, and semi-structured data Implement role-based access control and develop logical data models ensuring compliance and data lineage Document business transformations and establish data quality approaches and rules Create and maintain a comprehensive data catalog with metadata focusing on data sensitivity and security Translate architectural blueprints into implementations for data acquisition, preparation, and consumption Ensure data management and quality standards to support automated investment processes Apply data sharding concepts to optimize data architecture Develop a Neo4j-powered knowledge graph as the central data layer for investment intelligence Link research, strategies, and portfolio actions into a lineage graph for decision traceability Develop and maintain a multi-dimensional asset ontology for flexible categorization and analysis Integrate temporal versioning to enable time-aware queries and preserve historical context Incorporate GraphRAG to transform unstructured documents into queryable graph entities with source attribution Implement property-based access control for secure multi-tenant data visibility and query protection Oversee real-time data ingestion pipelines for multiple data types Lead the development of scalable data warehousing solutions using Snowflake Establish strategic frameworks for data quality and governance across the platform REQUIREMENTS Proficiency in Snowflake and Apache Airflow with 5+ years of experience Expertise in graph data structures and Graph RAG technology Strong background in data architecture and design with experience in market data sources Experience integrating AI-driven and assisted architectures Ability to share knowledge on Cypher, graph traversal, and RAG with teams Competency in implementing role-based and property-based access controls Experience managing real-time data ingestion pipelines Proficiency in documenting data transformations and quality rules Skilled in developing data catalogs, including metadata and sensitivity considerations Strong written and verbal English communication skills (B2+) NICE TO HAVESkills in AWS cloud-based solutionsWE OFFER We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview We will reach out to selected candidates exclusively EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.