Lionel Demangeon

🚀 Lazengo.com: High-Performance Full-Stack Platform

https://www.lazengo.com

Design and integral development of a next-generation marketplace connecting professionals and individuals

Ultra-High Performance Web Architecture

Symfony Stack + FrankenPHP in Worker mode: up to 4x faster than a classic architecture, with drastically reduced memory consumption

Optimized response times and ultra-fluid user experience thanks to the modern FrankenPHP web server

Responsive TailwindCSS interfaces with RESTful API integrations for real-time interactions

Scalable Cloud Native Infrastructure

Docker containerized deployment on Ubuntu/Debian VPS

Kubernetes orchestration ensuring 24/7 high availability

Automatic auto-scaling adapted to real-time user load

DevOps Excellence & Complete Automation

GitHub Actions CI/CD Pipelines: zero-downtime continuous deployment

Multi-level automated tests (unit, integration, functional)

Automatic rollback in case of anomaly for maximum security

Real-time application monitoring and proactive alerts

Digital Marketing & Growth Hacking

Multimedia content creation: Instagram visuals and videos for viral campaigns

Advanced SEO optimization for maximum visibility

Analytics and A/B testing for conversion rate maximization

Advanced Integrations

Secure payment services

Affiliate system for exponential growth

Microservices architecture for unlimited scalability

Mastered Technical Stack

Symfony/PHP - FrankenPHP Worker Mode - Docker/Kubernetes - JavaScript/TailwindCSS - GitHub Actions CI/CD - Ubuntu/Debian - REST APIs - PostgreSQL - Real-time Monitoring

Result: Production-ready platform, highly scalable and performant, capable of handling thousands of simultaneous users with an impeccable user experience.

Integration into a team of 8 engineers and integrators. Management of the IT system transformation with a global approach focused on MECM management of the Windows 10, Windows 11 machine and application fleet. Implementation of a proactive monitoring system that eliminated 98% of vulnerabilities across the entire IT infrastructure, MECM, Qualys, and Aternity. Standardization and industrialization of deployment methods by adapting the application packaging process, Innosetup, powershell, Intunes, MECM. Design and deployment of the new Windows 11 foundation. Creation of verification and provisioning tools in powershell. Deployment assistance and user support. Technical expertise on MECM, Windows 10/11, PowerShell, Active Directory, GPO, Intune environments.

Coordination of deployments for 4 distinct development teams, ensuring consistency, reliability, and adherence to delivery schedules through GitLab CI/CD and Jenkins orchestration. Mastery of the complete DevOps chain: use of GitLab software infrastructure (source code management and pipelines), Jenkins (CI/CD automation), Nexus (repository manager for artifacts), and Ansible (configuration automation) to secure deployment processes. Development of customized CI/CD pipelines adapted to the specific business needs of each team, integrating automated tests, blue-green deployments, and automatic rollback. Advanced automation: development of Python and Bash scripts to streamline recurring processes, reducing manual interventions by 60% and minimizing human error risks. Orchestration of continuous integration and delivery of software components on RHEL 8 environments, ensuring the quality of production environments. Technical expertise on RHEL 8 environments, Python/Bash development, GitLab CI/CD, Jenkins pipelines, Nexus repository management, and Ansible playbooks for assurance infrastructures.