Freelancer profile translated to English.
Back to original languageAbout Sébastien
Do you have
an idea for a **SaaS to launch**?
a **MVP, POC to develop quickly**?
Abusiness Web Applicationto create?
I specialize in developing SaaS and MVPs.
Fast time-to-market, choosing the right features, scalable architecture, performance and stability, business automation, AI integration, subscription management, and scalability.
What I regularly develop
B2B SaaS, startup MVPs, business CRMs, internal tools, analytics dashboards, web platforms, client areas, marketplaces, collaborative tools, and AI integrations.
They trusted me
Yumego.ai — EdTech AI SaaS MVP (Web App + Chrome Extension)
From idea to production in 3 months. Laravel + Inertia + Vue.js, real-time Chrome extension, OpenAI / DeepSeek. Scalable, ready for acquisition.
UpYourbizz — B2B SaaS Console + CRM
Self-service console delivered in 3 months (+15 dynamic criteria). +10 REST API endpoints and significant reduction in production bugs.
Albéa Cosmetics — Business CRM
Analysis, design, and delivery of a CRM for technical teams.
Who am I?
Full Stack Web Developer specializing in SaaS, MVPs, and web applications for 7 years, I support startups, entrepreneurs, and SMEs in the creation, evolution, and stabilization of digital products.
My stack & technical environment
Scalable SaaS with Laravel, Vue.js, and Nuxt.js: authentication, Stripe payments, REST API, dashboards, admin panel, monitoring, and analytics — on MySQL/PostgreSQL and Redis.
AI at the core of the product: OpenAI, Claude API, Laravel AI SDK, and AI agents to automate your business workflows.
Infrastructure: Docker and CI/CD on Hetzner with Laravel Forge (my reference setup). Also AWS, OVH, Scaleway, DigitalOcean, Vercel, and Cloudflare.
So, describe your project and let's discuss it?
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Yumego.aiDesign and development of an EdTech SaaS MVPEDUCATION AND E-LEARNINGAugust 2025 - February 2026 (6 months)Le Mans, FranceDesign and development of an EdTech SaaS MVP: Chrome extension + Laravel web app for real-time Japanese learning via Netflix subtitles. Typical solo Laravel builder mission: from idea to production product, a single point of contact from scoping to launch.
My daily tasks ⬇️
🎯 **Product Scoping**: positioning, user journey, key features🏗️Laravel Architecture Design+ Inertia.js + Vue.js (backend + web app)🧩Develop a Chrome Extensionfor real-time subtitle analysis on hover🤖Integrate an AI Layer(OpenAI / DeepSeek) for contextual analysis: vocabulary, grammar, JLPT level📊 **Build the User Dashboard**: vocabulary, progress, exports🔐 **Implement Authentication**, **User Management**, and data persistence☁️ **Industrialize Infrastructure**: CI/CD, hosting, monitoring🚀Iterate in MVP Modeto deliver a product ready for its first usersMy results ⬇️
- Complete SaaS MVP delivered from idea to production as a solo builder
- Chrome extension + Laravel web app deployed in production
- Scalable architecture ready for iterations and growth
- Operational AI stack (real-time contextual sentence analysis)
- Healthy technical foundation for the acquisition phase
- UpYourbizzPHP / Symfony Developer - SaaS configuration console on lead management CRMSOFTWARE PUBLISHINGJune 2025 - September 2025 (3 months)Le Mans, FranceDesign and development of an advanced configuration console integrated into a B2B SaaS lead management CRM, designed as a true self-service tool for sales teams.
My daily tasks ⬇️
🛠️Design the backend architecturePHP/Symfony for the console (dedicated service layer, decoupled modules, maintainable and testable code)🎯Develop a dynamic multi-criteria filtering engine(sales teams, lead typology, acquisition sources, distribution channels, value ranges)💾Implement user preference persistenceand dynamic rule combination🎨Build ergonomic interfacesin Bootstrap, allowing managers to configure lead routing and scoring without technical intervention⚡Optimize MySQL queriesto handle large data volumes with fast response times🔌Design and expose REST APIsto interconnect the console with other business modules of the SaaSMy results ⬇️
- Console delivered in 3 months,
- +15 dynamically combinable filtering criteria
- Total autonomy for sales managers in configuration
- Albea Cosmetics & FragrancePHP Developer — Refactoring of an internal business tool (team & machine park management)CHEMICALDecember 2023 - February 2024 (2 months)Le Mans, FranceAudit and takeover of a critical internal tool for managing teams and machine parks for the Albéa Cosmetics factory, used daily in production.
My daily tasks ⬇️
🔍Audit the existing applicationto identify blocking bugs, technical debt, and bottlenecks🏗️Restructure the PHP application architectureand optimize the data model🐛Fix critical bugsimpacting production and ensure reliability of business workflows🔄Secure the daily flowof product, mold, and machine synchronization💾Strengthen the backup and restore strategyto ensure service continuity📚Document the architectureand processes to facilitate handover to internal teamsMy results ⬇️
- 100% of blocking bugs resolved in 2 months
- 0 production interruption on the synchronization flow after refactoring
- Backup strategy made compliant and automated
- Tool made maintainable for internal teams
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Education
- UX2I LICENSE - DIGITAL BUSINESSIUT DE Blois2019Développements Web PHP Javascript SQL DevOps UX UI Design - Figma Gestion de projet - SCRUM - AGILE
- BTS SERVICES INFORMATIQUES AUX ORGANISATIONS - SOFTWARE SOLUTIONS AND BUSINESS APPLICATIONSLycée Saint Charles Sainte Croix - Le Mans2018PHP MVC, Visual Basic , c# bases HTML CSS Javascript Programmation orienté objet Gestion de projet méthode agile, SCRUM