Freelancer profile translated to English.
Back to original languageAbout Justin
👋 Hello! I'm Justin, afreelance Full-Stack developer specializing in SaaS development.
I work with startups and young companies that want to launch their product, add features, or evolve an existing codebase, without managing multiple providers.
As a Full-Stack Developer for 3 years on a production SaaS, I understand the concrete challenges behind every technical choice.
💡What I can build for you
- Web application or MVP from scratch, with a solid architecture from the start
- Taking over an existing project: new features, refactoring, or restoration
- Third-party integrations: Stripe for payments, business APIs, external services
- Custom admin area to manage your daily business
- Secure and maintainable code, designed to last
🛠️My stack
- **Frontend**: React, Next.js, JavaScript
- **Backend**: Node.js, Express, PostgreSQL, Prisma
- **Integrations**: Stripe, REST APIs, webhooks
- **Tools**: Git, Docker
🔁My way of working
- Scoping needs and priorities
- Architecture adapted to your context
- Short iterations with regular feedback
- Clean, documented, maintainable delivery
🎯What makes the difference
A single point of contact, a coherent product vision, 3 years of experience on a production SaaS, and code that won't cause you problems in 6 months.
✉️ Have a project in mind?
Write to me!
French
Native or bilingual
Remote only
Primarily works remotely
Experience
- SEPTEOFull Stack DeveloperSOFTWARE PUBLISHINGAugust 2023 - Today (2 years and 10 months)Montpellier, FranceFull-stack development within a French SaaS platform dedicated to IT management. Design and development of robust APIs and new backend features in PHP/Symfony, with particular attention to scalability and best practices. Work on PostgreSQL databases in a demanding production environment.
- Automobiles Szoldra SASFull Stack DeveloperAUTOMOBILEJanuary 2026 - June 2026 (5 months)Montpellier, FranceDesign and development of a showcase website for an automotive sales professional. Complete overhaul with a modern stack: Next.js / React frontend, Express backend, PostgreSQL database. Development of an administration area allowing the client to manage their vehicle catalog, as well as a supplier API integration for automatic data synchronization.
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Education
- Professional Title – Application Designer DeveloperEPSI2024Formation en conception et développement d'applications web et mobiles. Compétences acquises : architecture logicielle, gestion de projet agile, modélisation de bases de données, développement front-end et back-end.