Christophe Willemsen
Chief Technology Officer at O'Reilly
Greater Lecce Metropolitan Area Italy
Summary
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Rockstar🎓
Top SchoolChristophe Willemsen is a veteran technology leader and CTO at GraphAware with 15 years of experience building mission-critical, graph-powered analytics and NLP systems. He combines hands-on engineering—contributing to widely used open-source projects like Neo4j APOC procedures and Neo4j integration modules—with strategic R&D and product stewardship for Hume, GraphAware’s flagship product. Comfortable bridging security, operations and product roles, he has led integrations, interim product management, and swat teams for enterprise customers including Airbnb and the World Economic Forum. An O’Reilly co-author on Neo4j, he maintains deep partnerships with Neo4j and a focus on scalable observability, having implemented database monitoring procedures and unit-tested metrics at the kernel level. Based in Southern Italy, his background spans web, PHP and Elasticsearch integrations as well as naval communications operations—bringing disciplined systems thinking from NATO deployments into software reliability. He is known for turning complex graph use-cases into production-ready solutions that emphasize monitoring, resilience and practical developer tooling.
15 years of coding experience
4 years of employment as a software developer
CISCO Exploration I-IV Networks, CISCO Exploration I-IV Networks at Operationele School Den HelderHoger Secundair Onderwijs Electronics Engineering, Hoger Secundair Onderwijs Electronics Engineering at Operational School Den Helder
English, Dutch, French, Italian
Stackoverflow
19,817reputation
502kreached
638answers
3questions
forms
top-5%
symfony
top-5%
php
top-5%
cypher
top-1%
elasticsearch
top-5%
relationship
top-5%
Github Skills (28)
unit-testing10
stored-procedures10
back-end-development10
apidoc10
graph-database10
java10
neo4j10
javas10
php10
api10
cypher10
javascript9
relationship9
forms9
symfony9
Programming languages (18)
Github contributions (5)
neo4j-contrib/neo4j-apoc-procedures
Apr 2016 - Jul 2020
Awesome Procedures On Cypher for Neo4j - codenamed "apoc" If you like it, please ★ above ⇧
Role in this project:
Back-end Developer
Back-end DeveloperContributions:18 commits, 15 PRs, 6 pushes in 4 years 3 months
Contributions summary:Christophe implemented new APOC (Awesome Procedures On Cypher) procedures for the Neo4j graph database, specifically related to database monitoring. These procedures collect and expose various metrics about the database kernel, store, transaction manager, and object IDs. The user also wrote unit tests to validate the functionality of the new procedures, ensuring accurate data retrieval and proper integration. Furthermore, the user added a procedure to sort paths by distance.
neo4j-pluginneo4j-databasestored-proceduresmemgraphapoc
neo4j-documentation/developer-resources
Oct 2014 - Jul 2016
this repository is outdated and will be archived
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:30 commits, 8 PRs in 1 year 9 months
Contributions summary:Christophe contributed to the development of a PHP-based web application interacting with a Neo4j graph database, as evidenced by code changes in `index.php`. They also modified the frontend, including an `index.html` file and associated assets, suggesting UI/UX integration. Further contributions included updating examples for interacting with Neo4j using a PHP client library, demonstrating a focus on practical use cases.
outdatedarchived
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