Senior Knowledge Graph Engineer

Stack

Responsibilities

• ▹Design, implement, and maintain high-speed GraphRAG ingestion pipelines transforming relational data (ERP, SQL), unstructured ESG reports, and streams into Labeled Property Graphs (Neo4j, Memgraph) and RDF Triple Stores
• ▹Build automated NER, entity linking, and deduplication workflows to resolve data into unified canonical graph nodes
• ▹Implement automated ETL/ELT pipelines to federate internal supply chain data with external open-source ontologies (GLEIF, W3C SSN/SOSA, Copernicus, PROV-O)
• ▹Build low-latency GraphRAG retrieval layers with AI/ML engineers: optimized Cypher and SPARQL queries, NL2Query tools, hybrid vector-graph indexing, MCP tool endpoints
• ▹Operationalize SHACL shapes into automated data quality tests within CI/CD pipelines
• ▹Optimize multi-hop query performance, graph partitioning, and indexing for billions of nodes and edges

Requirements

• ▹Degree in Computer Science, Mathematics, Engineering, or a related technical discipline
• ▹4+ years of production experience building and querying graph databases (Neo4j, Memgraph, TigerGraph or GraphDB, Stardog, Virtuoso)
• ▹Strong cloud technology experience, preferably Azure (Azure Foundry, Azure Bicep, AzureML, Azure Cloud Storage)
• ▹Advanced Python proficiency (RDFLib, NetworkX, PyGraphistry) for scalable production data pipelines
• ▹Experience building entity extraction pipelines with modern NLP frameworks (LangChain, LlamaIndex, spaCy) or LLM-based extraction
• ▹Hands-on experience with data transformation tools (dbt) and integrating graph databases with vector stores (Qdrant, Pinecone, pgvector)
• ▹Solid understanding of semantic web standards (RDF, RDFS, OWL, SKOS, SHACL, RDF-star, SPARQL) and graph schema design principles

Nice to have

• ▹Experience with supply chain, carbon accounting (GHG Protocol), or lifecycle assessment (LCA) data structures
• ▹Direct experience building Model Context Protocol (MCP) servers to expose graph tools to LLM agents
• ▹Experience with enterprise OBDA approaches at scale

Soft skills

What we offer

• ▹Office and IT equipment provided
• ▹Flexible working hours
• ▹Wellness allowance for mental and physical wellbeing
• ▹Access to professional mental health support
• ▹Referral bonus policy
• ▹Meals and transportation vouchers (Coverflex card)
• ▹Dental benefits
• ▹Life & accident insurance + private health insurance
• ▹Paid volunteer day
• ▹Summer hours in July and August (36 hours/week)

About the company

EcoVadis is the leading provider of business sustainability ratings, analyzing data and building sustainability scorecards that give companies actionable insight into their environmental, social, and ethical risks.