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November 4, 2026

Database Engineer - Knowledge Graph Platform

Senior • On-site

Kraków, Poland

Quick Facts

  • Role: Database Engineer for a Knowledge Graph platform

Description

Build and evolve an enterprise Knowledge Graph platform supporting AI and Generative AI initiatives. The role focuses on graph database solutions, semantic data modeling (LPG/RDF), data ingestion pipelines (batch and streaming), and integration with LLM, RAG, and GraphRAG. You will also ensure data quality, lineage, metadata governance, and optimize performance, scalability, and cloud operating costs.

Responsibilities

  • Design, develop, and maintain a Knowledge Graph platform in production

  • Create and evolve data models using LPG and RDF paradigms

  • Design and develop ontologies, schemas, and data modeling standards

  • Build and maintain ingestion processes and batch/streaming pipelines

  • Ensure data quality, lineage, and metadata management standards

  • Implement and develop LLM-, RAG-, and GraphRAG-based solutions

  • Optimize query performance, scalability, and platform maintenance costs

  • Collaborate with Data, AI, Architecture, and Cybersecurity teams

  • Develop and maintain services running on Google Cloud Platform

  • Co-create engineering standards for reliability and observability

Requirements

  • Minimum 3 years of experience in Data Engineering, Database Engineering, or Platform Engineering

  • Practical experience with graph databases and production deployments

  • Knowledge of LPG technologies such as Neo4j, JanusGraph, FalkorDB (or similar)

  • Knowledge of RDF and standards including SPARQL, RDF, RDFS, OWL, SHACL

  • Experience with semantic data modeling and ontology design

  • Practical knowledge of Google Cloud Platform, including GKE, Cloud Run, Pub/Sub, Dataflow, BigQuery, and Cloud Storage

  • Experience integrating LLM solutions with embeddings, vector search, RAG, or GraphRAG

  • Proficiency in Python or Java/Scala

  • Experience building APIs, deployment automation, and CI/CD

  • Ability to work in complex enterprise environments with multiple stakeholders

  • Very good English proficiency

Benefits

  • Opportunity to build an enterprise-scale modern platform

  • Hybrid work model

  • Private medical care (LuxMed)

  • Multisport card

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