Freelancer profile translated to English.
Back to original languageAbout Christopher
Development of modern and high-performance web applications
I support companies and startups in the creation, evolution, and security of their web applications, from design to production.
Whether it's developing a new feature, redesigning an existing site, or optimizing a slow application, I intervene with a pragmatic approach: solutions adapted to your real needs, without unnecessary technical over-engineering.
Custom application development
• Design and development of robust REST APIs
• Complete frontend + backend applications
• Scalable and secure architecture
• Production and deployment
Redesign and optimization
• Modernization of existing sites (performance, UX, responsive)
• Reduction of technical debt
• Migration to modern stacks (NestJS, React)
• Optimization of loading times and SEO
Technical reinforcement
• Quick integration into existing teams
• Delivery of robust features
• Technical support and bug fixing
• Code review and recommendations
Application security
• Compliance with best practices
• Strengthening of access and protections
Main stack: NestJS, React, TypeScript, Tailwind CSS, PostgreSQL
Need a concrete web solution, without unnecessary complexity?
Let's discuss it.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Tisseco solidaireLead Backend DeveloperTRANSPORTATIONJanuary 2025 - December 2025 (11 months)NestJS, React, PostgreSQL, AWS S3, MapboxLead backend developer in charge of the complete API architectureDesign and development of the REST API (NestJS + TypeScript): JWT authentication, permissions management, data validationScalable and secure architecture: error handling, logging, monitoring, rate limitingHosting and DevOps:Deployment on dedicated server, Nginx configuration, environment management (dev/staging/prod), use of Coolify, optimization of CI / CD via local hosted docker registryData management:PostgreSQL (modeling, migrations, query optimization), automated backups, recovery strategyThird-party service integration:AWS S3 (file storage & DB backup), Mapbox (geolocation and interactive maps), webhooks for real-time syncApplication security:Encryption of sensitive data, protection against SQL injection, strict input validationPerformance optimization:Caching (Redis), pagination, SQL query optimizationComplete technical documentation (Swagger) to facilitate frontend integration and future maintenance
- Club EmployésFullstack Web DeveloperE-COMMERCESeptember 2021 - January 2025 (3 years and 3 months)Paris, FranceSymfony, Vue.js, MySQL, API PlatformFull-stack developer in charge of multiple projectsProduct architecture redesign:• Migration Symfony 4.4 → Symfony 6 + API Platform• Monolith to API + Vue.js frontend transition• Improvement of maintainability and scalabilityDesign and development of a modular contest system: business rule management, prize awarding, real-time statistics, participant assignment via batch or CSVInvoicing module redesign: automation, invoice generation, accounting integration, multi-currency managementDevelopment of robust REST APIs with API Platform: auto-generated documentation, data validation, error handlingBackend performance optimization: Redis cache, optimized SQL queriesUnit and functional tests (PHPUnit) to ensure code stabilityClose collaboration with the product owner to translate business needs into technical solutions
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Education
- Fullstack DeveloperEPITECH2023Titre de développeur - intégrateur web, Titre Niveau 5 RNCP - BAC +2
- SOFTWARE AND NETWORK PROJECT MANAGERESGI2024RNCP - BAC +3