Nicolas Mervaillie
Principal Consultant at Neo4j
Lille, Hauts-de-France
Summary
👤
Senior🎓
Top SchoolNicolas Mervaillie is a Principal Consultant with 11 years of experience helping organizations turn fragmented data into actionable knowledge using graph technology and JVM back-end systems. Based in Lille, he advises and implements Neo4j-based architectures, optimizes performance, and mentors teams while shaping internal best practices. He combines hands-on engineering with consulting, having contributed to core open-source projects like Neo4j OGM and Spring Data Neo4j—fixing transaction, concurrency and indexing issues that improve real-world stability. His background as a founder and tech lead means he’s comfortable from pre-sales and architecture down to code and CI/CD for microservices ecosystems. He regularly integrates Neo4j with Spring Boot, Kafka, Spark and search engines, and has a track record of rescuing and refactoring large production systems. Colleagues rely on him not only for technical depth but for translating complex data problems into pragmatic, deployable solutions.
11 years of coding experience
19 years of employment as a software developer
Computer science, Computer science at University of Lille 1 Sciences and TechnologyNetworksTelecom, NetworksTelecom at Université d'Artois
English, French
Stackoverflow
1reputation
0reached
1answer
0questions
Github Skills (26)
transaction10
spring10
databases10
spring-data10
graph-database10
repos10
java10
neo4j10
javas10
transactionscope10
transaction-manager10
hibernate-ogm10
neo4j-ogm10
database10
repository-pattern10
Programming languages (7)
Github contributions (5)
neo4j/neo4j-ogm
Feb 2017 - Jan 2018
Java Object-Graph Mapping Library for Neo4j
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 releases, 92 commits, 29 PRs in 1 year
Contributions summary:Nicolas primarily focused on improving the HTTP driver within the Neo4j OGM library, specifically addressing issues related to transaction handling and the "X-WRITE" header. They fixed a bug in a test that was never executed. The user also contributed to fixing tests, avoiding setup method overrides, and removing static session factories. Further commits included improvements to primary index handling.
javaneo4jobject-graphogmdatabase
spring-projects/spring-data-neo4j
Mar 2017 - Jan 2018
Provide support to increase developer productivity in Java when using Neo4j. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
Role in this project:Back-end Developer
Back-end DeveloperContributions:26 commits, 14 PRs, 32 pushes in 10 months
Contributions summary:Nicolas's commits primarily focus on improving the Spring Data Neo4j library's functionality and stability. Their contributions include addressing concurrency issues in repository finders, centralizing query execution, enhancing support for projections, and adding support for persistence constructors. Furthermore, the user implemented fixes for transaction rollbacks and optimized the `saveAll` method, demonstrating a focus on data access layer improvements.
javaneo4jdddspringspring-data
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