Freelancer profile translated to English.
Back to original languageAbout Guillaume
Expert in high-availability infrastructure design (Cloud & On-premise), I help companies secure, automate, and scale their critical platforms.
Why collaborate together?
I don't just "set up servers." I build resilient ecosystems, aligned with your business objectives and budget constraints. Whether you are in the creation phase (from scratch), migration, or facing critical load issues, I intervene to stabilize and modernize your stack.
My areas of intervention
Infrastructure as Code (IaC) & GitOps
Complete automation of your deployments via Terraform, Ansible, or Pulumi for full traceability and zero risk of human error.
Multi-Cloud & Sovereignty Expertise: Advanced mastery of US providers (AWS, Azure, GCP) and strong expertise in French sovereign cloud (OVHcloud, Scaleway).
Performance & Scalability
Audit and optimization of your architectures to handle load spikes and resist attacks (DDoS, intrusions).
CTO Support & Mentoring
Organizational transition, technology choices, and upskilling your internal teams on SRE best practices.
The Method
I combine the operational rigor of SRE with a strategic business vision. My approach is pragmatic: infrastructure should be invisible, performant, and above all, cost-effective.
English
Fluent
French
Native or bilingual
Italian
Fluent
Can work on-site
Lyon (up to 50km)
Experience
- Will HostingDevOps / SRE Consultant - Expert AWS, Azure, GCP, OVH, SCWApril 2019 - Today (7 years and 4 months)Lyon, France🏗️ Cloud Architecture & StrategyOn-Demand CTO: Strategic guidance, technology choices, and technical roadmap management.Cloud Architect: Design of resilient and scalable architectures in complex environments (Multi-cloud or Hybrid).FinOps: Audit and optimization of your Cloud bills to align technical performance with economic profitability.⚙️ Automation & DevOps CultureInfrastructure as Code (IaC): Industrialization of your deployments with Terraform and Terragrunt for reproducible and versioned infrastructure.GitOps & CI/CD: Implementation of continuous delivery pipelines (GitHub, GitLab, Bitbucket) and Git-driven workflows via ArgoCD and Helm.DevOps Evangelist: Acculturation and upskilling of your development teams to break down silos.🛡️ Reliability & Operations (SRE / SysOps)SRE (Site Reliability Engineering): Guaranteeing the availability and performance of your services on Legacy, Cloud, or Hybrid infrastructures.Containerization Expertise: Creation and advanced optimization of Dockerfiles for lightweight, secure, and performant images.Multi-Provider Management:Hyperscalers: AWS, Azure, GCP.Alternative & Sovereign: DigitalOcean, Hetzner, OVHcloud, Scaleway.
- STS Social Transport SolutionsChief Technology OfficerApril 2009 - March 2019 (9 years and 11 months)Lyon, FranceManagement & Strategy: Leading local and offshore technical teams. Board member with steering and reporting of technical and business KPIs.Agile Transformation: Scrum Evangelist, implementing rituals and a continuous improvement culture.DevOps Culture: Driving the DevOps philosophy to align development cycles with production imperatives.
- WhichBudgetChief Technology OfficerMarch 2008 - April 2009 (1 year and 1 month)Nice, FranceTechnical Lead: Managing a team of 3 developers and direct collaboration with the CEO.Infrastructure & Ops: SysOps responsible for the Web infrastructure (LAMP Stack).Data Engineering: Design of high-performance scraping systems for retrieving pricing data from major airlines.
Reviews
F
Futurmap
FUTURMAP
Reviewed on 10/13/2022
Thank you Guillaume for your professional support.
Maguy
Betterflies
Reviewed on 4/15/2022
Guillaume was able to advise us and provide us with a solution that met our needs. He showed availability, always answered our questions, and documented the various actions performed. I will work with Guillaume again as soon as I need his skills again. I highly recommend.
Recommendations
FU
FU
+1
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Education
- Master 1 Computer ScienceUniversité de Nice Sophia-Antipolis
- Master 2 STIC ISI in Software DevelopmentPolytech'Nice