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Thomas BelloisTB

Thomas Bellois

Site Reliability Engineer

€400/day
Caen, FR
8-15 years

Average response time: 1 hour

About Thomas

Ingénieur DevOps expérimenté avec une solide expertise dans le déploiement et la maintenance d’applications sur des environnements cloud et hybrides. J’ai dirigé plusieurs migrations de cloud pour des services bancaires critiques, en mettant l’accent sur la fiabilité, l’optimisation des performances et la sécurité des opérations. Compétent en monitoring, analyse du trafic et des performances, j’ai également l’habitude de travailler sous pression sur des applications critiques où la qualité et la disponibilité sont essentielles.

J’interviens fréquemment sur des projets nécessitant une restructuration, de l’automatisation et la résolution de dettes techniques, en apportant à la fois mon expertise technique et une approche collaborative. J’accorde une grande importance à la communication claire, afin que les membres de l’équipe comprennent et valident les systèmes et processus que je mets en place.

Je recherche une opportunité orientée remote-first, tout en restant ouvert à des visites ponctuelles pour rencontrer et m’aligner avec l’équipe. Fort d’une expérience avérée en travail entièrement à distance au sein d’équipes distribuées, je m’épanouis dans des environnements qui équilibrent autonomie et collaboration.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Orange
    Senior Devops Engineer - Professional Customer Authentication Services
    BANKING AND INSURANCE
    September 2024 - Today (1 year and 9 months)
    Caen, France
    • Responsible for deploying and upgrading the professional customer authentication service across multiple countries.
    • Managed CI/CD pipeline enhancements and network configuration updates to facilitate migration to the new private OpenShift v4 environment.
    • Developed Grafana dashboards to monitor authentication services effectively.
    • Led a working group to improve deployment practices for service components.
    • Participated in post-mortem analyses to enhance system reliability and performance.
    • Contributed to reducing technical debt by creating GitLab templates for streamlined project deployment.
    • Supported the CI/CD pipeline responsible for deploying testing tools used by the performance team.
    Gitlab GitOps Docker Keycloak Argo CD
  • Orange SA
    Cross Team Site Reliability Engineer - Performance Monitoring Squad
    BANKING AND INSURANCE
    April 2022 - June 2025 (3 years and 2 months)
    Caen, France
    • Refactored and merged different project to centralized the deployment of the monitoring stack Grafana-Prometheus-Thanos on Openshift of all Orange Money services for 3 clusters. Unified all apps deployment using Ansible and Kustomize to reduce the technical debt.
    • Configured Prometheus rules to manage alerts on the production environment & created a Grafana board to quickly view all environment states. (10 production environments ~600 pods)
    • Reduced infrastructure resources consumption by optimizing deployment, pod sizing, and scaling configuration.
    • Created a Gitlab project to deploy a performance toolbox easily on every environment. (K6-Prometheus-Grafana)
    • Automated weekly bench tests to analyze the evolution of the performance.
    Grafana Prometheus Site Reliability Engineering Test de performance OpenShift
  • Orange SA
    DevOps Tech Lead - Video Conferencing Projet
    TELECOMMUNICATIONS
    November 2020 - March 2022 (1 year and 4 months)
    Caen, France
    • Designed and deployed a multi-environment Kubernetes infrastructure for a video conferencing project.
    • Used Flexible Engine Cloud, the Orange Business Services Cloud solution.
    • Used Infrastructure as Code tools Terraform & Ansible
    • Created data management cluster (Elasticsearch – Kibana – Fluentd – Prometheus – Grafana) to track the environment.
    • Designed a Gitlab CICD pipeline to automatize 20+ micro-services deployments.
    • Created a template to secure the configuration and upgrade the global security level of the project by using tools as Sops or Kube-hunter.
    • Created documentations and exchanged with Romanian operating teams and familiarized them with the chain.
    Terraform Ansible Infrastructure as code Tech Lead Elasticsearch

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Education

  • Crash Course on Python
    Crash Course on Python
  • ENSICAEN - Enseignement
    Ecole publique d'Ingénieurs et Centre de Recherche.
    ENSICAEN - Enseignement

Skill set

Categories