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Guillaume StreitmatterGS

Guillaume Streitmatter

AWS Cloud Architect

€778/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

AWS Cloud Architect Solutions, with a strong background in designing, optimizing, and securing complex cloud architectures. With a track record marked by on-premise/cloud interoperability projects, infrastructure migration, and automation via Terraform, GitLab CI, Jenkins; I have successfully supported companies in their transformation and adoption of AWS best practices.

Passionate about technology, my goal is always to satisfy the client and respect their wishes. I have 8 years of experience in Cloud and 4 years in network engineering.

My objective is to bring strategic cloud expertise to companies seeking to modernize their infrastructure and optimize their AWS cloud utilization with high-performance and secure solutions.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 10km)

Experience

  • Skello
    AWS Cloud Architect
    July 2022 - July 2024 (2 years)
    Paris, France
    The objectives of this mission were to enable development teams to gain autonomy and reliability in their application deployments. Also to establish and ensure adherence to AWS architecture best practices. Management of technical debt, implementation of best practices, and management of documentation.

    Design and deployment of AWS infrastructure

    ‣ Design, creation of architectures, infrastructure migration
    ‣ Implementation of the GitOps approach
    ‣ Mitigation of data risks
    ‣ Design and implementation of Terraform CI/CD, Infrastructure as Code
    ‣ Automation of the delivery process with GitLab-CI
    ‣ Migration of CI to EKS with installation and configuration of GitLab agent
    ‣ Use of Atlantis as an open-source Terraform CI tool

    Project management and steering

    ‣ Technical lead of the Cloud team
    ‣ Liaison between project stakeholders
    ‣ Writing and establishing best practices
    ‣ Structuring project and technical documentation
    ‣ Implementation of documentation tracking

    Projects led

    Terraform Migration: workspaces
    DNS Migration: CloudFlare to AWS Route 53
    Network Optimization: Transit Gateway

    Deployment and configuration of EKS clusters
    ‣ Optimization and cost management of resources using the Karpenter tool
    ‣ Deployment of open-source tools on clusters via Helm and Kustomize: ArgoCD, Argo Event, ArgoCD Image Updater
    ‣ Deployment of system tools: AWS LB, external secrets, external DNS
    ‣ Permission assignment via service accounts: IRSA
    ‣ Monthly cluster maintenance with version tracking
    ‣ EKS clusters on workload and review app environments
    ‣ Monitoring: Datadog

    Review App Migration: EC2 to EKS
    ‣ Containerization of the Skello application
    ‣ EKS compute management: Karpenter, ECR
    ‣ Resources: external DNS, ExternalSecret, Parameter Store
    ‣ Release versions: ArgoCD, Image Updater
  • JELLYSMACK
    AWS Cloud Architect
    September 2020 - January 2022 (1 year and 4 months)
    Paris, France
    International startup whose core business is video editing, targeting content creators on YouTube. I participated in the design and implementation of numerous technical evolutions of the AWS platform within a team of eight junior internal Cloud Engineers.
    The daily objective in this varied technical context was, among other things, to upskill the Cloud Engineers team in the field of Infrastructure as Code, but also to support the client in the migration of infrastructures and applications.

    Design and deployment of AWS infrastructure

    ‣ Design and creation of architectures
    ‣ Risk mitigation
    ‣ Infrastructure interconnection
    ‣ Deployment automation
    ‣ Infrastructure as Code

    Project management and steering

    ‣ Liaison between project stakeholders
    ‣ Writing and establishing best practices
    ‣ Structuring project and technical documentation
    ‣ Implementation of documentation tracking with Notion

    Projects completed

    Standardization of infrastructure as code best practices
    ‣ Definition of Terraform resource naming conventions. Use of make, pre-commit, and Checkov by Bridgecrew.

    Co-design and implementation of a multi-account architecture
    ‣ Initially, developers and data analysts worked on a single AWS account. The goal was to reduce risks related to quotas and to isolate workload and data environments.

    Implementation of a new DNS solution
    ‣ Initially, JellySmack's legacy DNS provider was CloudFlare; AWS Route 53 was the new solution chosen, with Gandi as the DNS registrar.

    Implementation of cost management strategies

    Implementation of the GitOps approach

    Establishment of a new VPN solution

    Migration of GitLab CI/CD

  • Orange Bank
    AWS SRE
    September 2019 - September 2020 (1 year)
    Paris, France
    During this mission at Orange Bank, I worked on interconnecting on-premise resources with AWS by implementing a solution based on AWS Direct Connect and AWS Transit Gateway. I contributed to improving AWS best practices. Implemented internal documentation through templating and optimized the Git experience. In a DevOps approach, I implemented a CI/CD solution with Bitbucket, Jenkins, and Terraform for continuous integration and deployment of AWS resources.

    Design and deployment of AWS infrastructure

    ‣ Design and creation of architectures
    ‣ Infrastructure interconnection
    ‣ Deployment automation
    ‣ Infrastructure as Code

    Project management and steering

    ‣ Liaison between project stakeholders
    ‣ Writing and establishing best practices
    ‣ Structuring project and technical documentation
    ‣ Implementation of Confluence documentation tracking

    Projects completed

    ‣ Automation of the delivery process with Jenkins
    ‣ Implementation of the DevOps approach
    ‣ Encryption of KMS API keys
    ‣ Migration with Direct Connect Partner Migration

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Skill set

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