Freelancer profile translated to English.
Back to original languageAbout Alexis
I support companies in addressing the challenge of scaling their teams and platforms across all DevOps, DevSecOps, and SRE topics on various Clouds (AWS, Azure, GCP). I specialize in Kubernetes, its ecosystem, Cloud technologies, observability, and generally, everything related to the DevOps world.
With 10 years of experience in tech, from Developer to Tech Lead, I have intervened in various structures (Large groups, Start-ups, Scale-ups) across the entire DevOps and SRE scope.
I have notably implemented Cloud platforms from scratch and complete observability systems, which have resulted in savings of several hundred thousand euros, significant reduction in MTTR, and Time-to-Market.
I primarily intervene on 4 themes:
🔍 Application Observability: What tools to implement to enable developers to be more autonomous in monitoring the applications they develop, and reduce Mean Time to Repair.
☁️ Architecture and deployment of resilient and optimized Cloud infrastructures: Building the platform that meets the technical requirements of applications.
🔄 CI/CD: What continuous integration and deployment strategies to implement to minimize Time-to-Market.
🔒 Security (DevSecOps): Implementing a security strategy that meets regulatory requirements (secret management, IAM/RBAC, Network Policy...)
My favorite topics:
✅ Implementation of a complete observability system for monitoring distributed systems.
✅ Design and architecture of modern cloud infrastructures.
✅ Industrialization of application management on Kubernetes.
✅ Cloud cost optimization (FinOps).
✅ Application scalability.
✅ Implementation of efficient CI/CD pipelines to reduce Time-to-Market.
✅ Structuring a Tech organization (DevOps approach).
✅ Implementation of a security strategy.
French
Native or bilingual
Can work on-site
Paris (up to 50km), Paris (up to 50km), Lyon (up to 50km), Toulouse (up to 50km)
Experience
- DefactoSenior SREBANKING AND INSURANCEApril 2024 - Today (2 years and 3 months)Paris, FranceDefacto is a fintech company specializing in automating financing for SMEs. The company is growing rapidly, requiring a reliable, secure, and scalable infrastructure.As a Senior SRE, I led and executed several initiatives to improve the reliability and security of their infrastructure, as well as cost optimization:🔹 Infrastructure Management Improvement: Refactoring of the Terraform codebase to simplify infrastructure deployment and maintenance.🔹 Administration of application AWS services and other technical components deployed on AWS: ECS, Fargate, RDS, RabbitMQ.🔹 Critical Database Migration: Migrating RDS PostgreSQL databases from version 11 to 16 with minimal downtime.🔹 Security and Zero Trust Network Access (ZTNA): Implementing Twingate to enhance network security, reducing the attack surface while maintaining a smooth user experience for developers.🔹 Role-Based Access Strategy: Implementing centralized RBAC with AWS IAM and Google Workspace for granular access control.🔹 Development of an internal CLI to facilitate developers' daily tasks (Authentication, secret access, full AWS environment deployment, anonymized database restoration...).🔹 Analysis and optimization of all infrastructure costs.Implementation of a versioning strategy to ensure reliability of application deployments.🎯 Impact:✅ 40% reduction in infrastructure costs.✅ 90% reduction in onboarding and offboarding management time, with automated access management.✅ Security compliance, preparing for ISO 27001 and SOC 2 certifications.✅ Significant reduction of Terraform technical debt, streamlining infrastructure management.🛠 AWS, Terraform, ECS, PostgreSQL, RabbitMQ, Python, Datadog
- PrimoSenior SRE / DevOpsSOFTWARE PUBLISHINGJuly 2024 - Today (2 years and 1 month)Paris, FrancePrimo is a tech start-up developing collaborative tools for remote teams. With a growing infrastructure, cost optimization and SOC 2 compliance were priorities.As an SRE consultant, I supported the engineering team in the following areas:🔹 Infrastructure Cost Optimization: Tripling AWS costs through targeted optimizations on managing a large-scale single-tenant multi-instance infrastructure.🔹 Infrastructure Industrialization: Refactoring Terraform code to enable scalability across the multi-instance architecture, all automated.🔹 End-to-End Observability: Implementing comprehensive observability with Datadog for logs, traces, and metrics of AWS services.🔹 SOC 2 Certification Preparation: Implementing Zero Trust principles, centralized access management, and log retention strategy.🎯 Impact:✅ Savings of €100K over a year in infrastructure costs.✅ Significant reduction in Mean Time to Repair thanks to the observability system, allowing correlation of logs, traces, and metrics.✅ Security improvement that led to SOC 2 certification.🛠 Technical Environment: AWS, Terraform, Vanta, ECS, RDS, Redis, NodeJS, Datadog
- Vaudoise AssurancesSenior SRE / DevOpsBANKING AND INSURANCEJune 2024 - November 2024 (6 months)Lausanne, SwitzerlandVaudoise Assurances, a major player in the Swiss insurance market, undertook to modernize its on-premise and cloud applications while strengthening the observability and reliability of its services.Within the observability team, I led various projects:🔹 Improvement and maintenance of the observability platform: Administration and evolution of the ELK observability platform.🔹 Development of Ansible playbooks and Terraform/Terragrunt modules for managing the deployment of the observability stack and its components: ElasticSearch Cluster, Kibana, LogStash, Beats, Elastic APM.🔹 Creation of log collection pipelines with LogStash, Filebeat, and Azure EventHub.🔹 Support for R&D teams on all Azure services observability topics: Databricks, Function App, AKS, Web App, CosmosDB, EventHub, Service Bus...🔹 Implementation of Grafana and Prometheus for monitoring ElasticSearch clusters with Elastic Exporter and creation of a custom dashboard.🎯 Impact:✅ Significant reduction of technical debt on the observability platform.✅ Increased adoption of the observability platform by development teams, improving their autonomy.🛠 Technical Environment: Microsoft Azure, Kubernetes, Terraform, Terragrunt, ElasticSearch, Kibana, Logstash, Elastic APM, Beats, Prometheus, Grafana, Azure EventHub
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Education
- Engineering Degree, Computer Science and NetworksEcole des Mines d'Alès2019Diplôme d'ingénieur, Informatique et Réseaux
- University Diploma in Technology in Computer Science, Computer ScienceIUT de Montpellier-Sète2016DUT Informatique, Informatique