Freelancer profile translated to English.
Back to original languageAbout Sébastien
I help scale-ups and SaaS companies to make their Kubernetes platforms reliable, reduce their AWS cloud costs, and speed up their deployments.
Examples of results:
- 75% reduction in AWS costs
- Migration of VM platforms to Kubernetes
- Implementation of self-service GitOps platforms for developers
- Industrialization of Terraform / Helm / ArgoCD
Available for SRE, Cloud Engineering, Platform Engineering, and Kubernetes missions.
French
Native or bilingual
English
Fluent
Can work on-site
Lyon (up to 10km)
Experience
- ScrollSite Reliability EngineerAugust 2023 - Today (3 years)
- Migrating all services from VM to Kubernetes, effectively improving services deployment
- Designing and coding of a Platform for developers to deploy and update new services, to launch a devnet in one go and to launch a shadow-fork of ethereum mainnet. Based on GitOps principles, Argocd and custom coding.
- Designing a helm chart to deploy the scroll stack onto third parties infra in one go (scroll-sdk product)
- Designing a helm library to simplify the use of helm charts by our developers
- Managing Scroll cloud infrastructure and reducing AWS cost by 75% in a year.
- Monitoring and mitigating cloud security security incidents
- LedgerSite Reliability EngineerDecember 2021 - August 2023 (1 year and 8 months)Paris, France
- Designing and maintaining helm charts for applications
- Deploying resources required in the cloud using Terraform
- Deploying and maintaining CI/CD pipelines for microservices, using Argocd
- Troubleshooting incidents related to the microservice infrastructure
- Supporting incidents related to the blockchains infrastructure (Node, Explorer, Indexer, Validator)
- Automating operations using configuration management system for the infrastructure with Ansible
- Troubleshooting incidents related to the infrastructure - databases, pub/sub, servers, cloud functions, CI/CD pipelines
- Improving the monitoring using datadog and prometheus metrics
- UnimarketDevOps EngineerNovember 2020 - December 2021 (1 year and 1 month)Auckland, New ZealandUnimarket offers a SaaS solution for companies to manage their procurements. I work as a DevOps at Unimarket, managing the cloud infrastructure, facilitating developers tasks using automation such as CI/CD or scrips, and securing the infrastructure. I have the following functions :- Developing and maintaining the cloud infrastructure of the company using Infrastructure as Code- Developing and maintaining the microservices infrastructure using kubernetes- Automating tasks on applications and databases servers using Ansible and bash scripts- Designing and implementing the monitoring of the company product- Ensuring the infrastructure is secured and follows the PCI-DSS standard- Mitigating security issues- Developing and maintaining CI/CD pipelines- Troubleshooting production issues- Helping in designing IT infrastructure strategy, architecture, and processes
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Education
- Engineer's degree, Computer Science and System NetworkingEcole supérieure de Chimie Physique Electronique de Lyon / CPE Lyon2014Engineer's degree, Computer Science and System Networking
- DUT - two years diploma, Computer Systems Networking and TelecommunicationsUniversité Joseph Fourier (Grenoble I)2011DUT - two years diploma, Computer Systems Networking and Telecommunications
Certifications
- CKA: Certified Kubernetes AdministratorThe Linux Foundation2021
- AWS Sysops Administrator – AssociateAmazon Web Services (AWS)2024