Freelancer profile translated to English.
Back to original languageAbout Johann
💡 About me
Full Stack Developer for 5+ years and experienced Tech Lead, I help ambitious startups and SMEs design and deploy high-performing, scalable, and secure web and mobile applications.
⚙️ My core expertise
- Mobile & Frontend: Flutter, Ionic, Angular, React, Next.js
- Backend & API: Symfony/PHP, Node.js, .NET, Strapi
- Databases: PostgreSQL, MySQL, SQLite (offline-first)
- DevOps & Cloud: Docker, CI/CD GitHub Actions, OVH, Nginx, S3/MinIO
- Payments & Subscriptions: Google/Apple In-App Purchase, Stripe, RevenueCat, Purchasely
- Scalability & Architecture: dev/test/prod environments, microservices, monitoring
🚀 What I bring
- Implementation of robust and scalable architectures
- Expertise in complex topics: offline sync, subscriptions, e-commerce integrations (Colissimo, Stripe, etc.)
- Fast and maintainable delivery thanks to best practices (tests, CI/CD, clean code)
- A pedagogical and collaborative approach: I can act as a mentor/lead or in operational execution.
Examples of achievements:
- 🚐 Travel mobile app (Flutter + Symfony): 500k+ downloads, premium system with Apple/Google subscriptions and offline management.
- 🤝 Collaborative platform (Angular + Flutter): thematic filters, offline maps, local partner integration.
- 📦 E-commerce API (ASP.NET Core): automatic Colissimo label generation, advanced weight/dimension logic.
- 🎮 Indie video game (Godot/Unreal): prototype of a voxel survival RPG with procedural generation and day/night cycle.
- 📝 Productivity SaaS (React + Tauri): markdown notes app with integrated AI and local/cloud sync
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- BeecomingWeb DeveloperTECHJuly 2020 - Today (5 years and 11 months)Montlieu-la-Garde, FranceI hold the position of Lead Web Developer, I am involved in several business application projects for large companies and some ministries.I also manage several teams of developers
- Kereon IntelligenceWeb Developer / Data ConsultantTECHMarch 2020 - July 2020 (4 months)Niort, FranceI had the pleasure of developing a web interface that transmits in real-time the activity of a storage warehouse thanks to cameras and an AI that detects and identifies the type of element it sees (Person, pallet, forklift).
- Ecole O'clockStudentMarch 2019 - August 2019 (5 months)Région de La Rochelle, France
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Education
- Computer Science DegreeUniversity of La Rochelle2015
- ReactJs Web DeveloperO'Clock2019Formation en Téléprésentiel - Labélisée Grande École du Numérique. 700h de formation intensive. 3 mois de Socle : HTML/CSS/PHP 1 mois de Spécialisation : ReactJs 1 mois de projet : www.rate-my-rent.fr
Certifications
- Advanced Web Project Quality Mastery CertificationOpquast2019