Freelancer profile translated to English.

Description

Senior React / Next.js Developer, SaaS, e-commerce, and AI

Web developer for over 15 years, I provide senior reinforcement or frontend lead on long-term missions for product, SaaS, and e-commerce teams.

I help teams deliver reliable, performant, and maintainable React / Next.js interfaces faster: new features, redesigns, migrations, dashboards, back-offices, order funnels, API integrations, design systems, and pixel-perfect Figma integration.

I have notably worked for Descours & Cabaud, the Montpellier Metropolis, Lefebvre Dalloz, and PeopleSpheres, on SaaS, e-commerce, and business tool projects with strong product and technical constraints.

What often makes the difference on a mission: I integrate quickly, communicate clearly, I am autonomous, punctual, and reliable in execution. I place as much importance on code quality, maintainability, performance, and user experience as on delivery speed.

AI and Vibe Coding

I use AI as a development accelerator, with a structured workflow: clear specifications, shared conventions, AI agents, codebase documentation, and systematic review of generated code.

This approach allows me to accelerate prototyping, development, refactoring, and documentation, without sacrificing the quality expected of a senior profile.

I am currently the founder of cviz.app, an AI CV generation and adaptation SaaS, developed with agents. This is concrete proof of my use of AI in a real product context.

15 5/5 ratings and 5 recommendations on Malt.

Available mainly full remote, with the possibility of hybrid depending on location.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Paris (up to 50km), Nancy (up to 50km), Nantes (up to 50km), Lyon (up to 50km), Metz (up to 50km)

Arte
Fullstack Next.js Laravel Developer
July 2026 - Today (1 month)
Strasbourg, France
Within ARTE, I maintained and evolved legacy tools. I also participated in the redesign and modernization of existing applications, migrating them to architectures based on Next.js and Laravel.
CViz.app
Founder of CViz, AI Application SaaS
SOFTWARE PUBLISHING
February 2026 - Today (6 months)
Metz, France
Creation of CViz.app, an AI application SaaS for creating, adapting, and tracking applications from a single interface.

I lead the project end-to-end: product vision, UX, development, deployment, user acquisition, monetization, and roadmap evolution.

The product includes a CV editor, a cover letter editor, AI automations, an AI coach, application tracking, a subscription system, and Stripe payments.

I launched the product quickly thanks to a structured vibe coding workflow with AI agents: detailed specifications, assisted generation, code review, refactoring, testing, and production deployment.

Stack: Next.js, React, TypeScript, Tailwind CSS, shadcn/ui, Base UI, AI SDK, Drizzle, Stripe, Better Auth, PostHog, Sentry, Vitest, Playwright.
Next.js Typescript Vibe coding AI Agent Native AI
Descours et Cabaud
Lead Frontend Next.js Developer, Magento 2 E-commerce Migration
RETAIL (SMALL BUSINESS)
January 2025 - January 2026 (11 months)
Lyon, France
One-year engagement as Lead Frontend on the redesign of 3 B2B e-commerce sites, migrating the Magento 2 frontend to Next.js 15.

A complex project involving around forty people, with a large product catalog, professional accounts, custom pricing, stock availability, advanced business rules, multi-brand environment, and sometimes slow microservices.

My role: technical and architectural choices, PR reviews, ticket breakdown, mentoring junior developers, and coordination with backend, design, and product teams.

I primarily worked on product listings and search, internationalization, caching with Redis, Next.js server requests, performance optimization, design systems, and redesigning complex components to improve team maintainability and velocity.

Stack: Next.js 15, React, TypeScript, GraphQL, Apollo Client, Tailwind CSS, React Aria, Redis, Vitest, Storybook, Cloudflare.
Next.js Apollo GraphQL TailwindCSS React.js Typescript

Check out Jonathan's experience

Jérôme

Place de la Formation

Reviewed on 2/8/2024

I am leaving my third positive review for the quality of Jonathan's work ;-)

Jérôme

Place de la Formation

Reviewed on 2/8/2024

Another project completed with Jonathan, always with great involvement, responsiveness, advice, and commitment from him. I recommend working with Jonathan, who is a true expert in his fields. Thank you Jonathan!

Show all 15 reviews