Freelancer profile translated to English.
Back to original languageAbout Jérémy
💻 Fullstack Developer - React.js - Node.js - Next.js - Typescript
+10 years of experience and +25 clients supported
Contract Type: Staff Augmentation or Fixed Price
Looking for aFullStackdeveloper specialized inJavascriptandTypescript**, with deep expertise in **ReactandNode.js**, who can handle your web project from A to Z, from **Frontendto **Backend**?
You're in the right place! Here's an overview of my skills 👇
✅ NodeJs Backend Developer
➡️BackendDeveloper inNode.js
➡️NodeJs/Typescript
➡️ API Architecture -Clean architecture/Hexagonal architecture
➡️ REST API / GraphQL
➡️ SQL / NoSQL Databases
➡️ PostgresSQL / MongoDB
➡️ Microservice Architecture
- Node.js, Express.js, Koa.js, NestJS, Hapi.js, LoopBack, AdonisJS, Sequelize, Mongoose, GraphQL, Apollo Server, REST API, JWT, OAuth, Passport.js, Socket.io, PM2, Jest, Microservices, terraform, AWS.
✅ React - NextJs Frontend Developer
➡️Frontend React.js / NextJsDevelopment
➡️ Deep mastery ofReact.js
➡️ Mastery ofTypescriptwithReact.js
➡️ ExpertReactJs / NextJs
➡️ Creation of design system components in React
- HTML5, CSS 3, JavaScript, Typescript, React.js, Vue.js, Next.js, Gatsby, Bootstrap, Tailwind CSS, Material-UI, SASS, Webpack, Babel, Redux, MobX, GraphQL, AJAX, Fetch, JSON, DOM, Responsive Design, PWA, Frontend Testing, UI/UX Design.
👇 Why I can help you 👇
Thanks to myFullStack | Frontend | Backendexperience in **React.js**, **NodeJs**, **NextJs**, I am able to:
- Design and develop complete web applications
- Solve complex problems
- Ensure the maintainability and scalability of your applications
- Collaborate effectively
Feel free to contact me to discuss your project and see how I can help you achieve your goals. Looking forward to collaborating with you!
Jérémy 🚀
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Mia ExpertsFullstack Developer | React | NodeMEDICALJanuary 2026 - July 2026 (6 months)Paris, France
Context
MIA is an "AI-native" SaaS software for medical practice management intended for surgeons and general practitioners.I am acting as asenior Fullstack developeron the entire stack (React.js/Node.js–NestJS/PostgreSQL/Prisma), with a cross-functional role on several structuring axes:- Industrialization of an AI agent-driven development workflow,- Application **security**, real pentest validation (HDS compliance / Ségur numérique en santé standard).- Integration of regulatory health services (DMP, Pro Santé Connect, INSi)- Integration of business featuresMissions
AI Workflow- Industrialization of a development workflow entirely driven by **AI agents**: skills, multi-agent workflows automating the complete ticket cycle (code search, plan, implementation, review, commit, PR, Jira update).
- Parallel development orchestration in an isolated worktree, with dedicated parallel test Docker stacks.
- Design of an AI code review pipeline
Security- Complete application security for real pentest (successfully validated)
- Integration of state services as part of the Ségur du numérique en santé
Architecture & Quality- Backend refactoring inClean Architecture
- Unit / Integration / E2E testing strategy (Playwright) and CI/CD optimization (runner memory, automated review agent).
- Feature Flags system (conditional visibility)
Technical Aspect
Backend**: **Node.js/NestJS/ Prisma /PostgreSQL/ RedisFront-end**: **React.js/TypeScript/ Vite / Tailwind CSS / MobX / React Query / Inversify**AI & Agents**: Claude Code (multi-agent agents & workflows) cursor, review & pentest agentsCI/CD & Tools: GitHub Actions, Docker, Playwright, Firebase Auth, Jira - Oppus by Lefebvre DallozFullStack Developer React.js / NodeJsSOFTWARE PUBLISHINGFebruary 2025 - July 2026 (1 year and 5 months)Nancy, France
Context
Oppus is part of the Lefebvre Dalloz group and publishes an application dedicated to the creation and management of legal documents.I contributed to the development of new features for the editor and to the optimization of several key technical aspects of the platform.#Missions
- Development of new features within the clause editor, improving the experience of creating legal documents.
- Development of an AI natural language search engine.
- Active participation in code reviews, improvement of code quality and alignment with team best practices.
- Collaboration with product and technical teams to analyze needs, refine specifications, and improve application stability.
Technical Aspect
-Node.js-Next.js-React.js- PostgreSQL- CI/CD- TypeScript - PepyteFullstack Developer | React.js | Node.jsHUMAN RESOURCESMay 2024 - January 2025 (8 months)Paris, France
Context
Pepyte is a recruitment firm specializing in startups and tech companies.I was assigned as afull-stack JavaScript / TypeScript developerto design, develop, and evolve Pepyte'sSaaSapplications.I took charge of the entire technical stack —backend Node.js / NestJS**, **frontend React.js**, **PostgreSQLdatabase, andCI/CD— to deliver the key features of versions V1 and V2.The mission was carried out in direct collaboration with the CTO and the product team.Missions
- Backend development inNode.js/NestJS/ **TypeScript**: design of robust, scalable, and maintainable APIs.
- Frontend development inReact.js/ **TypeScript**: complex interfaces, advanced forms, and reusable components.
- Design and development of aChrome pluginintegrating an **AI agent**, aiming to optimize recruiters' workflow.
- Implementation and evolution of a React design system (design tokens, shared components, technical guidelines).
- Optimization of PostgreSQL queries and improvement of the platform's overall performance.
- Writing and validation of technical designs for several strategic features.
- Development of key features: Notification System, Report Generation, "Login as" System, Advanced Design System Components...
- Monorepo work
Technical Aspect
-Node.js-NestJs-React.js- PostgreSQL- Monorepos- Typescript- CI/CD
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Education
- Bachelor's DegreeIUT Valence2013Développement Web Back-end : PHP, node.js Front-end : HTML CSS Javascript react.js