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Knowledge graphs,
built to be used.

Practical Neo4j and graph-AI work - ontology design, multi-source ingestion, and retrieval that holds up in production. By Konrad Kaliciński.

See the work↗Read the guides↗
Published on the Neo4j Developer Blog Neo4j Certified Professional Neo4j Graph Data Science certified
// context graphs - grounding LLM answers(:Document)-[:MENTIONS]->(:Entity)-[:GROUNDED_IN]->(:Context)
// supply chain - component traceability(:Supplier)-[:SHIPS]->(:Component)-[:ASSEMBLED_INTO]->(:Product)
// crop protection - biorationals against pests(:Biorational)-[:TARGETS]->(:Pest)-[:THREATENS]->(:Crop)
// legal - case law over regulations(:Ruling)-[:INTERPRETS]->(:Article)-[:PART_OF]->(:Regulation)

ABOUT

I build and ship knowledge graphs on Neo4j - ontology design, multi-source ingestion, GraphRAG, and the unglamorous plumbing that makes a graph survive contact with real data.

I write about this work every week: what is working, what is not, and what most teams get wrong on their first knowledge-graph project.

More about me →

START HERE

GraphRAG vs vector RAG: when a graph helpsWhat 2025-2026 benchmarks say about GraphRAG vs vector RAG: where graphs win, where plain RAG ties, what graphs cost, and how to test it on your own data.When not to build a knowledge graphFive signs you can skip a knowledge graph, what to use instead (SQL, search, vector RAG), and the three conditions under which a graph earns its cost.How to test a knowledge graphTest a knowledge graph with competency questions, zero-row invariants and count tripwires in Cypher, run on every load. With a worked 10-K example.Reuse, extend or build an ontology: how to decideWhen to reuse a standard ontology such as SNOMED CT, FIBO or EPPO, when to take a slice and extend it, and when to build your own.All guides →

WRITING

Medium ↗LONG-FORM · WEEKLY Long-form articles on Neo4j, GraphRAG, and applied graph-AI.

RECENT ARTICLES

OCT 5, 2026Schema Migrations for Neo4j Graph Types: Evolving a Knowledge Graph Model SafelyNEO4J DEVELOPER BLOGA worked example with expand and contract, Neo4j-Migrations and invariant checks, tested on Neo4j 2026.09 Enterprise.
SEP 14, 2026Parser First, LLM Second: Building a 10-K Knowledge Graph in Neo4jFive companies, five years, 25 SEC filings - and a rule that the numbers never touch a language model. The build behind the 10-K graph, from raw filings to chat.Full guide →
SEP 1, 2026How I Test a Knowledge GraphCompetency questions and invariants turn "the graph looks right" into something you can verify - shown on a 10-K filings graph anyone can read.Full guide →
All articles →

Shorter takes and project notes: LinkedIn ↗

SELECTED WORK

Polish plant-protection product register → NEO4J · GRAPHRAG · Q&A DEMO

A graph of registered pesticide products, active substances, crops, target pests, application windows and dosage - built from official register data and product labels, with a working question-answering demo.

SEC 10-K Filings Graph → NEO4J · GRAPHRAG · Q&A DEMO

25 annual reports from 5 mega-cap companies as one graph of relationships - competitors, dependencies, and risks tracked over time - built from SEC 10-K filings with a working question-answering demo.

More verticals in progress - new graphs land here as they ship.

CONTACT

Working on a graph?

Tell me what decision the system should support and which data you have. You get a direct answer on whether a graph is worth scoping, and what the first step would be.

Send a message →