Freelancer profile translated to English.
Back to original languageAbout Laurent
Looking for a senior fullstack developer capable of taking a product end-to-end: architecting, deploying, optimizing, and maintaining it over time? That's what I've been doing for 5 years.
I cover the entire chain: technical scoping with product, frontend (React, Next.js, React Native), backend (Node.js, Kotlin/Spring Boot), cloud infra (AWS, GCP, Docker), CI/CD, caching, monitoring. I'm not an order-taker waiting for a ticket: I challenge technical choices and ensure the system can handle the load.
The experience backing this up: an e-learning platform cross-platform with 150,000 users/month in 10+ countries with offline-first and RGAA accessibility constraints. A B2B SaaS for tax professionals with LLM integration at the core of the funnel, driving trial-to-paid conversion to 35%. A white-label Next.js/Strapi foundation that reduced infrastructure costs by 80% for a higher education group. Real products, real traffic, real constraints.
Applied AI is the other lever I bring. RAG pipelines, LLM integration in production, hybrid search – not buzzwords, but code in production.
Typical missions: end-to-end fullstack development, technical lead, system architecture and refactoring, DevOps infra, AI integration, design systems, mentoring. Startups or structured environments.
Case studies and full stack on lgenty.dev.
French
Native or bilingual
English
Fluent
Chinese
Conversational
Remote only
Primarily works remotely
Experience
- Gradigang SolutionsFullstack Developer, DevOpsSOFTWARE PUBLISHINGFebruary 2021 - Today (5 years and 4 months)Bordeaux, FranceREACT, SUPABASE, NODE.JS, CLAUDE, AWS, THREE.JS, GITLAB CITwitch Party – Real-time interactive platform for streamers
- Complete fullstack architecture (design, dev, deployment, monitoring): +3k viewers/stream, real-time collaborative PWA mini-games (<15ms latency)
- Development of interactive 3D mini-games with Three.js, synchronized in real-time via WebSocket
End-to-end autonomous projects (sandbox)- HSKey: Free mobile Chinese learning app (React PWA, Supabase)
- Rift: Advanced statistical analysis tool for League of Legends (React, REST API, real-time data aggregation)
- Map engine with pathfinding (A*, Dijkstra, multi-criteria search, points of interest)
- Production deployment and maintenance on AWS; monitoring, CI/CD and continuous iterations
- AD EducationLead Fullstack DeveloperEDUCATION AND E-LEARNINGJanuary 2025 - August 2025 (7 months)Bordeaux, FranceNEXT, REACT, TYPESCRIPT, FIREBASE, NODEJS, TAILWIND, DOCKERDesign of e-learning web platforms & technical expertise
- Frontend development with Strapi integration and RESTful API (+100k visits/week); ISR + caching (-80% costs)
Automation of deployments & DevOps infrastructure management- Front/back CI/CD pipelines; migration from SQLite to PostgreSQL via Docker
Technical leadership & mentoring- Onboarding and mentoring of 2 junior developers (autonomous in 3 weeks); SCRUM rituals, code reviews, pair programming
- Integration of Claude into the workflow (architecture, PR, refactoring), reducing review cycles and decision-making load
- BeTomorrowFrontend DeveloperSOFTWARE PUBLISHINGFebruary 2021 - December 2024 (3 years and 10 months)Bordeaux, FranceREACT, REACT NATIVE, TYPESCRIPT, GITLAB CI/CD, NODE.JS, AWSE-learning platform (150K+ users/month)
- Development then lead frontend web and mobile role on a cross-platform application (desktop, offline, mobile) compliant with accessibility standards
- CI/CD pipelines, backward compatibility of interactive manual data schemas and progressive reduction of legacy code
- Coordination with pedagogical, sales teams, and users
- Optimization of the build toolchain, performance, and end-to-end tests; reliable deployment on a fleet of thousands of heterogeneous devices (Android, Windows legacy) worldwide
- RGAA accessibility compliance level AA validated by Access42 audit; 92% user retention rate over the year
Lead Fullstack – B2B SaaS for R&D investment experts- Development of a tool for managing tax credits (CIC/CIR/CII): complete intervention on the product chain, from business needs analysis with accountants to production release
- Design of the design system from scratch, React frontend and Express backend development, management of complex financial calculations and R&D file validation workflows
- Trial-to-paid conversion rate of 35% for early clients, reflecting the tool's fit with business needs
- Onboarding of the first clients with direct technical support and rapid iterations based on user feedback
Technological watch & transmission- Animation of technical dojos on web accessibility and React Native
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Education
- Computer Science Engineering, Software EngineeringENSEIRB Matmeca2021Ingénieur Informatique, Génie Logiciel (Major Génie Logiciel)
- Computer Science Diploma (DUT)University of Bordeaux & UQAC2018DUT Informatique Major de promotion
Certifications
- Developing accessible websites compliant with RGAAAccess422024