Freelancer profile translated to English.
Back to original languageAbout Chani
Théo | Senior Fullstack Developer | React.js ⏐ Next.js ⏐ Node.js
Senior Fullstack developer with 10+ years of experience, I support companies in the design, redesign, and scalability of complex web applications.
Specializing in React.js, Next.js, and Node.js, I work on SaaS platforms, B2B e-commerce, and business applications with an approach focused on performance, quality, and delivery.
🚀 Technical Expertise
- Frontend: React.js, Next.js
- Backend: Node.js, TypeScript, REST API
- PostgreSQL & query optimization
- Microservices architectures
- E2E tests (Cypress)
- CI/CD & automation
🎯 Key Experiences & Results
Lucca
High-growth multi-tenant SaaS platform
Node.js API Redesign → Strict TypeScript
PostgreSQL Optimization
Implementation of E2E tests & CI/CD
-32% API response time
-40% incidents related to regressions
Kaliop
Lead Developer
Delivery of B2B e-commerce platform (10k+ users/month)
CI/CD: deployment reduced from 2h to 15 min
Managed a team of 6 developers
Zenika
Fullstack Consultant
Microservices → x3 scalability
Introduction of TDD → -30% production incidents
AngularJS → React migration without interruption
💡 My Added Value
- Complete Fullstack Vision (React.js / Next.js / Node.js)
- Ability to take over complex systems
- Quality, performance, and DevOps culture
- Technical Leadership
I don't just develop features
I build solid, stable, and scalable architectures
Available for missions in Fullstack React.js / Next.js / Node.js Development, SaaS Redesign, or Lead Developer role in full remote
French
Native or bilingual
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- LuccaFreelance - Senior Full-Stack DeveloperTECHApril 2021 - January 2026 (4 years and 9 months)Paris, FranceContext:High-growth multi-tenant platform.Actions:
- REST API Redesign (Node.js → Strict TypeScript)
- PostgreSQL query optimization
- E2E tests implementation (Cypress)
- Automated CI/CD
-32% average API response time-40% incidents related to regressions - KaliopLead DeveloperDIGITAL AND ITFebruary 2019 - March 2021 (2 years and 1 month)Paris, France
Technical project management for B2B e-commerce.
Major Results:- Delivery of platform with 10k+ monthly users
- CI/CD implementation → ↓ deployment time from 2h to 15 min
- Managed team of 6 developers → reduction in technical turnover
Fullstack web developmentFullStack Web DeveloperFullStack - ZENIKAFull-Stack ConsultantDIGITAL AND ITMarch 2016 - January 2019 (2 years and 10 months)Results:
- Microservices implementation → x3 scalability
- TDD Introduction → -30% production incidents
- AngularJS → React migration without service interruption
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Education
- Senior Full-stack DeveloperSenior Full-stack Developer2026Développeur Full-stack Senior