Guillaume Delbergue

OPSaaS est une agence DevOps : on aide vos équipes à concevoir et améliorer leurs infrastructures techniques pour répondre aux enjeux du scale. C'est-à-dire : ✅ Plus de disponibilité et de résilience pour assurer l'accès à l'app / site à vos clients, même en cas de montée en charge inattendue ou d'incendie dans un datacenter. ✅ Plus de sécurité, parce qu'en grandissant vous pouvez devenir la cible de cyberattaques et on peut mitiger le risque en amont. ✅ Moins de délais entre les livraisons, et une meilleure prévisibilité - gestion des coûts. D'un manière générale, nous optimisons la performance et de la résilience de l'infrastructure, vos coûts, et la sécurité. ➡️ On a trois offres, selon votre niveau de maturité DevOps : ▪️ SET-UP | On crée / migre votre infrastructure sur Kubernetes en un mois. Conteneurisation des applications, mise en place du cluster, stack de monitoring, installation CI/CD. ▪️ BUILD | Développements cloud sur-mesure. Mise à disposition de nos experts DevOps et Cybersécurité, méthodologies agiles, documentation selon vos standards. ▪️ SUIVI DEVOPS | Un expert DevOps externalisé. Maintenance de votre infrastructure, gestion des incidents (forfait d'heures négocié), ligne directe avec un DevOps senior, rapport mensuel et recommandations d'actions. 🔍 Observabilité applicative : outillage pour permettre aux développeurs d'être plus autonomes sur la surveillance des applications qu'ils développent, et réduire le MTR (Mean Time to Repair). ☁️ Architecture et déploiement d'infrastructures Cloud résiliantes et optimisées : Construire la plateforme répondant aux exigences techniques des applications, Infrastructure for Code (IfC) 🔄 CI/CD : Stratégies d'intégration et de déploiement continu pour minimiser le TTM (Time-to-Market). ➡️ Services, stack, prise de rdv ou en me contactant directement : https://www.opsaas.fr

Hiventive supports industrial actors in optimising their production. We design specific solutions to the different industrial sectors, from inventory management, to production by connecting your machines to order shipment. We help you reducing your costs and lead times by providing your teams with tools (Manufacturing Execution System) that will reduce human errors and automate as many operations as possible.

1st, 2nd year and 3rd year in a French Engineering School

Main topic: Setup complete new HA trading infrastructure. AWS / OVH / Hetzner. Multi-Region. Kubernetes. Terraform, Ansible, Flux, ArgoCD, Mimir, Loki. Kafka, NATS, PostgreSQL, SQLServer, ClickHouse. Cost optimization. Compliance with financial systems. Took the lead of the Infrastructure team while the Head of Infrastructure was focusing on compliance and certifications. Managed technical decisions, team coordination, and ensured project continuity. Data platform setup: Dagster, ClickHouse. HFT infrastructure optimizations. API Gateway setup and lead. Colocation setup. [Confidential]

Main topic: Migrate existing solution to a SaaS infrastructure. Led the deployment of a comprehensive multi-environment infrastructure for a SaaS platform, ensuring seamless integration and scalability. Managed the setup of the entire infrastructure, coordinating technical aspects and resource allocation. Provided critical assistance to development teams and collaborated closely with product teams for a smooth transition to the new solution. Implemented best practices for scaling, enhancing system reliability and performance. Improved product development processes, streamlining workflows and fostering team efficiency. Terraform Cloud. AWS. Developed solution for Self Hosted customers

Main topic: Refactor whole self hosted solution and setup 0 CVE product. Spearheaded the implementation of a self-hosted deployment solution, focusing on enhancing security and operational efficiency. Led the transition towards zero CVE product images, emphasizing a strong commitment to cybersecurity. Oversaw the integration of Chainguard to ensure robust, secure communications within the deployment infrastructure. Managed cross-functional teams, facilitating collaboration between technical and product departments to meet project milestones. Mentored team members, driving continuous improvement in deployment strategies. Actively participated in on-call duties, providing critical support and ensuring rapid response to operational issues, further demonstrating leadership and technical expertise. Led the complete refactoring of the Self-Hosted solution deployed on OpenShift, with a strong focus on security and operational efficiency.

Main topic: Terraform modules for GCP. Audit of the existing architecture and report. Frontend, Backend and Data Analytics templates. Documentation. Best practices. Architecure, Terraform, Git, GitHub, Python, TypeScript, API, Design

Main topic: Migration from massive MongoDB Legacy, multi-clusters, multi-regions on AWS and Azure to MongoDB Atlas with almost no downtime. One to many clusters split to better handle load and preparation for sharding: Go application built from scratch. New multi-tenant schema refactoring for performance. Terraform and Terraform Cloud, GoLang, Custom exporters, Logs exporter, Thanos, Alert, Grafana, Application migration strategy, Charts upgrade, minimal downtime for migrations (strict SLA). Microservices optimizations: MongoDB queries, design, concurrency, latency, ... Support duty. Ansible. Kubernetes, AWS, Azure, Skaffold, Flux (v2), Vault, Private Link. GitHub Actions. Blue-Green and Canary deployments.

Advances in SystemC/TLM Virtual Platforms: Configuration, Communication and Parallelism. Electronic Simulation. Hardware Design. Embedded Systems. Methodologies. Instruction-set and pipeline simulation, memory hierarchy modeling. Experience with ARM-based SoC. SystemC Kernel editor. Simulation for parallel and heterogeneous architectures.

Webapp lead developer using Symfony 2 PHP framework. System and network administrator.

Evaluation of simulation performances for real time graphical systems : a tool concept to anticipate and analyze the performance of applications. Validation of the concept of virtualization of a GPU using SystemC.

Electronic, Embedded System, EDA, Hardware Design, ASIC, FPGA