Freelancer profile translated to English.

Description

Full Stack Developer (React.js/Node.js/Next.js) | Web & SaaS Applications Specialist | +5 years of experience

I help companies design high-performing and scalable digital tools: business applications, SaaS platforms, modern interfaces.

My goal:transform complex needs into simple, reliable, and intuitive solutions.

I support SMEs and startups in creating custom platforms, from the front-end interface to the back-end architecture:

– High-performing, user-friendly, and responsive websites & applications

– Task automation, digitalization of business processes

– Security, scalability, and best practices (testing, CI/CD, clean code)

Key Services:SaaS Development | AI Integration | Migration & Redesign | Performance

My Full Stack Approach:

Modern Frontend:Next.js, React, TanStack, TypeScript/Zod, Tailwind CSS, ShadcnUI

Robust Backend:Node.js, Express, tRPC, REST/GraphQL APIs

Databases:PostgreSQL/Prisma, MongoDB, DynamoDB

Automation & AI:OpenAI, Claude, RAG, chatbots

DevOps:Scalable architecture, CI/CD, monitoring, GCP

Why Choose Me?

✓ Agile and iterative delivery

✓ Transparent communication

✓ Scalable and maintainable architecture

✓ Post-delivery support

👉 Contact me to turn your project into reality. Response within 1 hour.

Languages

French
Native or bilingual
English
Fluent
Chinese
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 50km)

LORÉAL
Fullstack React / Python Developer (FastAPI) | AI & Cloud (GCP)
December 2025 - Today (8 months)
Saint-Ouen, France
- Integration and optimization of features within digital platforms
- Design and implementation of service-oriented cloud architectures for integrating AI and data solutions
- Collaboration with Data/AI teams to integrate intelligent assistance features
- Personalized recommendations based on ML models (customer tracking, sales actions)

Stack: React / Python Fast API / AI / GCP
React Front-end Web Developer REST API Artificial Intelligence Python Google Cloud
Dune Health
FRONTEND DEVELOPER
MEDICAL
September 2025 - October 2025 (1 month)
-Design and integration of user interfaces
-Data management and real-time synchronization
with TanStack Query, TanStack DB, and Live Queries
-Client-server routing and communication via TanStack Router and tRPC
-Performance optimization (useMemo, useCallback, React.memo, virtualization with TanStack Virtual, lazy loading, code splitting)
tRPC TanStack-DB TanStack-Router TanStack Query React.js
Kai It Consulting
FULLSTACK DEVELOPER
February 2025 - July 2025 (5 months)
- Frontend: Next.js, React Query, Zustand, TypeScript (SSR, SEO, reactive UI)
- Backend: Express.js, hexagonal microservices architecture (Port/Adapter)
- Asynchronous communication with RabbitMQ, queued tasks via workers
- Security: JWT, rate limiting, Redis, DDoS protection
- Decoupled REST API, designed for future mobile application
Node.js Next.js Express PostgreSQL Typescript

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RNCP Level 6
LE REACTEUR
2020
RNCP Niveau 6

Denis Thai

Web Developer React.Js/Next.Js/Node.Js

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