About Jean-Marie Renouard
Elite DBA consultant and DataOps architect, co-developer of MySQLTuner and technical author, dedicated to critical systems engineering for over 20 years.
Uncompromising Technical Craft
Entrepreneur since 2012, I founded Lightpath with a clear conviction: architectural coherence and database performance form the true backbone of every scaling business.
With hard-won experience in mission-critical banking and energy estates (BNP Paribas / BP2I, EDF Datanumia, RENATER), I assist engineering teams across the full data lifecycle: from high-availability topologies to surgical query tuning and CI/CD testing pipelines.
My deep involvement in Open Source (co-developer of MySQLTuner-perl) and technical book authorship (PHP Performance) ensure that every engagement delivers battle-tested standards, without fluff or junior intermediaries.
NoSQL & Distributed
Cassandra (23 clusters) & MongoDB (600 DBs)
DataOps Leader
PostgreSQL, MySQL & CI/CD Pipelines
Strategic Professional Milestones
Cassandra & MongoDB Lead DBA Expert
2025 — PresentProduction operations of a massive NoSQL estate: 23 Cassandra clusters and 600 MongoDB databases. Automated operations via Ansible Tower and continuous query telemetry optimization using internal AI models (Mistral).
DevDataOps Cassandra / MySQL / PostgreSQL
2022 — 2025Operational management of 120 RDS PostgreSQL/MySQL instances and 7 high-throughput Cassandra clusters (12 TB data). Full infrastructure automation: Terraform, Ansible, Rundeck, ArgoCD, and Kubernetes.
Senior Data Engineer
2021 — 2022Mission-critical reliability for 190 Linux servers. Management of MariaDB Galera multi-master clusters for 4,800 academic users (250 TB data). Custom automation engineering in Golang and Puppet.
PostgreSQL Lead DBA
2019 — 2021Administration and tuning of 110+ PostgreSQL production servers and 250 databases under 24/7 retail logistics load. Full operations containerization via Docker and Ansible.