About Jean
Infrastructure and security engineer with over 20 years of experience in critical environments. Self-taught, curious, passionate about open source and self-hosting. I acquired my expertise through self-learning, listening to experts, and constant hands-on experience deploying resilient applications.
Specialized in Linux, cloud, CI/CD, security, and observability, I can operate at all levels of modern infrastructure. I work closely with developers and business teams, with a product-oriented mindset.
I have strong experience in highly regulated domains: finance, personal data, PCI-DSS audits. My approach focuses on automation, collective understanding, and transparency.
French
Native or bilingual
English
Fluent
Can work on-site
Bordeaux (up to 10km)
Experience
- P00LSSenior Devops EngineerTECHJanuary 2022 - November 2025 (3 years and 10 months)Bordeaux, FranceMaintaining high-traffic applications in productionFast and reliable delivery
- Continuous improvement of delivery time.
- Adoption of Trunk Based Development.
- CI/CD tracing with OpenTelemetry.
Proactive problem detection- Reducing alert noise.
- Anomaly detection in applications.
- Making alerts understandable by all.
Infrastructure ownership- Efficient use of cloud services.
- Ensuring high availability.
- Monitoring and optimizing cost.
Achievements- Migrated from GKE Autopilot to GKE Standard using Gateway API for cost control and advanced features (auth, scale-to-zero, rate limiting with EnvoyGateway).
- Added tracing to front-end applications: Client visibility (optimization and error detection).
- Industrialized CI/CD using GitHub Actions.
- Replaced Datadog with OpenTelemetry + Loki/Grafana/Tempo/Prometheus: monitoring costs cut by 66%.
- Integrated Web3 constraints (event indexing, reliability, security).
- SinchOperations, Security & Software EngineerTECHJanuary 2020 - January 2022 (2 years)Bordeaux, FranceCloud migration and overhaul of marketing toolsCloud migration
- Step-by-step transition from bare-metal to ECS.
- Infrastructure as Code.
- Decommissioning non-critical components.
Observability and security- Improved monitoring and alerting.
- Instrumented legacy apps with OpenTelemetry.
- Forwarded relevant logs to the security team.
- Holacratic organization for clear roles.
Enabling team- Knowledge sharing: pair/mob programming.
- Making complexity explicit and reducing it.
Achievements- Deployed Campaigns app across multiple regions via ECS.
- Automated simultaneous deployment to physical and cloud environments.
- Set up 24/7 on-call support focused on business-critical issues.
- LGOInfrastructure & Security EngineerBANKING AND INSURANCEJanuary 2018 - January 2020 (2 years)Bordeaux, FranceSecure cloud infrastructure for financeInfrastructure as Code
- Immutable infra, segmented by business context.
- Automated testing, building, and deployment.
Performance & Security- Centralized logging, performance tracking.
- Security event monitoring.
XP mindset- Pair/mob programming, code reviews.
- Attended Agile Open, Newcrafts.
- Real threats involving millions of euros.
Achievements- Designed cloud platform with simple updates and auto-healing.
- Deployed Zero Trust Network using Consul Connect.
- Implemented centralized logging + distributed monitoring (Elastic, Prometheus, Thanos, Jaeger).
- Proactively handled YesWeHack Bug Bounty program.
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Education
- BTS informatique de gestionSaint John Perse2004
Certifications
- Certified Kubernetes Administrator (CKA)The Linux Foundation2026