About Guillaume
French
Native or bilingual
English
Fluent
Experience
- SynalticSRE - Kubernetes OperationsJanuary 2016 - July 2022 (6 years and 6 months)Vincennes, FranceResponsible, within a small team, for the smooth operation of several Kubernetes clusters, semi-hosted on OVHCloud, serving as a common foundation for internal applications and CI/CD workflows based on Kubernetes runners.The platform hosted critical internally developed applications, with strong requirements for availability, security, and observability.Main Responsibilities:
- Operation and maintenance of multi-environment Kubernetes clusters.
- Provisioning of an application hosting platform for development teams.
- Design, deployment, and maintenance of CI/CD pipelines using Kubernetes runners.
- Management of application and platform high availability.
- Supervision and monitoring: collection and centralization of logs, application and system metrics, alerting, and incident management.
- Platform security: management of access and users, permissions control, security of flows and workloads.
- Support and guidance for development teams on Kubernetes best practices.
- Active participation in technological watch and continuous improvement of the platform.
Key Achievements:- Maintained a stable, secure, and scalable multi-cluster Kubernetes platform over time.
- Continuous improvement of operational and reliability practices.
- Industrialized the execution of CI/CD pipelines via Kubernetes.
- Contributed to raising the DevOps maturity level of internal teams.
- Debugging, updates
Stack & Tools:- Kubernetes
- Docker
- Helm
- CI/CD via Kubernetes runners
- Monitoring & alerting (prometheus + grafana)
- Kubernetes Security (certificates, network policies, OPA)
- Ministère des sports, de la Jeunesse et de la Vie associativeTech Lead - SI-HonorabilityPUBLIC SECTORJanuary 2023 - January 2024 (1 year)Paris, FranceThis is an administrative web application that allows citizens to request a certificate of good conduct. This full-stack project, based on modern technologies (VueJs, NodeJs, Kubernetes, ...), primarily provides users with sensitive personal data entry forms through a clear, secure, and accessible interface. The core of the product involves processing the entered information, storing it, and managing its lifecycle, up to its deletion in accordance with GDPR. It also includes managing workflows that simultaneously query multiple external APIs, such as B2 or FIJAIS, to accept or reject the certificate application.The product has enabled the generation of tens of thousands of certificates and notably identified several individuals unsuitable for positions involving contact with children.I was involved in this project for several months as a tech lead, technical referent, and senior developer. I implemented the micro-services oriented architecture, integrated into a CI/CD mechanism. In addition to actively participating in development, I provided technical support to the team, offering advice and validating some of the Pull Requests.
- GUIGOPSFull Stack / Data EngineerJanuary 2023 - Today (3 years and 7 months)Paris, FranceAs tech lead, I assisted in the development of two web applications for the general public. The applications leveraged the state's design system and integrated with the tools and best practices provided to ensure project longevity (Git, Pull Requests, Kubernetes, Jira documentation).I was responsible for framing the project and the team, ensuring a sufficient level of quality (standardizing team skill levels, implementing common rules, and adhering to best practices such as appropriate test coverage), and deciding on the technical architecture after analyzing the needs.Technical Stack:
- VueJs via NuxtJs for the front-end
- NodeJs for the back-end
- PostgreSQL for persistence
- FranceConnect
Challenges Encountered:*Accessibilityfor all audiences*Securityand isolation of sensitivepersonal data- Task execution planning
- Technical and businessmonitoringof the application
- User support in administrative procedures
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Education
- Master 2 - MIAGE - IDUniversité Paris Dauphine2011Master 2 - MIAGE - ID
Certifications
- CKS: Certified Kubernetes Security SpecialistThe Linux Foundation
- Associate Cloud Engineer CertificationGoogle Cloud