Freelancer profile translated to English.
Back to original languageAbout Gabriel
Full Stack Developer ⏐ React ⏐ Node.js ⏐ Quick interventions & critical missions
Full Stack Developer
(ex-ETNA Mentor), I intervene on high-urgency technical missions: blocking bugs, API integrations, optimization, or delivery of critical features, as well as the integration of AI solutions into your applications.
My areas of intervention
Debugging & bug resolution
- Correction of critical frontend (React) & backend (Node.js) bugs
- Quick analysis of existing code
- Platform stabilization
Development & features
- Adding features to existing applications
- Rapid delivery of features in constrained environments
- Refactoring and migration to TypeScript
- API & integrations
- Connecting systems and automating workflows
AI & LLM
- Integration of GPT-5 / OpenAI API into your applications
- Semantic analysis, OCR, automatic sorting, content generation
- RAG pipelines and AI agents to automate your business processes
Optimization & maintenance
- Performance improvement
- Dependency updates
- Application security
🛠 Technical Stack
- TypeScript / JavaScript
- React / Next.js / TailwindCSS
- Node.js / Express / NestJS
- PostgreSQL / MongoDB
- Python / OpenAI API / n8n
- Docker / Git / CI/CD / Unix
Why work with me
- Quick intervention on critical missions
- Strong ability to understand existing code quickly
- Clean, documented, and production-oriented code
- Clear communication and regular follow-up
- Dual expertise: classic development + AI integration
My positioning
Ex-Mentor at ETNA, I trained developers for several years: I am used to demanding environments, short sprints, and complex technical issues.
I'm not here to drag out projects.
I'm here to unblock, deliver, and secure quickly.
📩 An urgent bug? A feature to deliver quickly? An AI to integrate?
French
Native or bilingual
English
Native or bilingual
Spanish
Conversational
Remote only
Primarily works remotely
Experience
- DATAKEENFullstack JS & Mobile Dev | BI SaaS Platform & Flutter App EvolutionSOFTWARE PUBLISHINGApril 2025 - September 2025 (5 months)Paris, France🚀 Impact & Achievements:Backend Architecture (Nest.js): Design of a secure and scalable RESTful API. Implementation of Rate Limiting and JWT authentication strategies to strengthen the protection of sensitive data.Data-Intensive Frontend (React.js): Development of interactive analytical dashboards. Integration of D3.js for custom visualization of large volumes of data (Big Data) without latency.Cross-Platform Mobile (Flutter): End-to-end creation of the mobile application (Android & iOS). Implementation of real-time synchronization with the web version for a unified user experience.Technical Strategy: Active contribution to the product roadmap. Audit of existing systems and architecture recommendations to ensure platform scalability (transition to V3).🛠 Technical Environment: React.js, Flutter, Nest.js (Node.js), TypeScript, D3.js, Docker, Git/GitLab CI.
- GoPlutoPython Data & Automation Developer (OCR/Scraping) - InsurTechBANKING AND INSURANCEJuly 2023 - January 2024 (6 months)Paris, France🚀 Context & Challenges: For GoPluto (Digital insurance broker), complete automation of the offer comparison process for complex profiles (canceled policies). The objective: to extract and structure customer data from various PDF documents and external web sources.⚡️ Technical Achievements:Intelligent OCR Engine (Optical Character Recognition): Development and Fine-tuning of models (Tesseract / EasyOCR) to extract data from vehicle registration cards and information statements with an accuracy rate >92%.Advanced Web Scraping: Design of robust bots (Selenium, BeautifulSoup) capable of bypassing protections (Captchas, Rate Limiting) to retrieve real-time insurer rates.ETL & Data Engineering Pipeline: Architecture of a data processing pipeline: Cleaning, Validation, and Structuring before insertion into the database or API.🛠 Technical Environment: Python, Tesseract OCR, EasyOCR, Selenium, BeautifulSoup, Pandas, ETL, Docker.
- ETNATechnical Mentor & Fullstack Auditor (React/Node.js) - EdTechEDUCATION AND E-LEARNINGFebruary 2024 - April 2025 (1 year and 2 months)Paris, France🚀 Context & Challenges: Expertise mission within ETNA (Apprenticeship School for IT). The objective was to support students' skill development on complex Fullstack architectures and ensure the technical quality of their educational platforms.⚡️ Achievements & Impact:Code & Architecture Audit: Critical review of projects (Code Review) on the React.js / Node.js stack. Identification of anti-patterns, refactoring, and API security.Mentoring & Best Practices: Leading advanced technical workshops on SQL query optimization, frontend performance, and software architecture.DevOps & Industrialization: Support in setting up CI/CD pipelines and debugging staging/production environments to make students autonomous in deployment.Pedagogical Supervision: Transferring development best practices and validating the technical choices of project teams.🛠 Technical Environment: React.js, Node.js, PostgreSQL, REST API, CI/CD, Git, Code Review.
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Education
- Expert in Information Technology (Master's Degree)EPITECHFormation d'excellence en informatique (Pédagogie par projet). Acquisition d'une expertise technique profonde et d'une grande capacité d'adaptation : Socle Technique "Bas Niveau" : Maîtrise de l'algorithmique complexe et de la gestion mémoire (C, C++, Unix) permettant une compréhension optimale des langages modernes (Python, JS). Architecture & Innovation : Conception de systèmes logiciels robustes et scalables. Gestion de Projet : Pilotage d'équipes, respect des deadlines (Rushs) et méthodes Agiles. Spécialisation : Intelligence Artificielle & Data Engineering.