Freelancer profile translated to English.
Back to original languageAbout Alexy
đź‘‹ Hello! I am Alexy,AI & Fullstack Engineer.
I help you transform complex ideas into robust and scalable products. I bring a rare dual expertise:
1. **Generative AI**: Autonomous multi-agent architectures, RAG pipelines, LLM observability/evaluation.
2. **Fullstack & SaaS**: NestJS/Node.js backends, Vue/React frontends, React Native mobile, cloud (AWS, Supabase).
With an engineering background and as a SaaS co-founder, I understand business and technical challenges to deliver quickly with quality (TDD, Clean Architecture).
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🛠️WHAT I CAN DO FOR YOU:
Generative AI & Agents:
* Design and orchestration of multi-agent systems (15+ agents in production).
* RAG pipelines and unstructured data processing (Vision + NLP).
* LLM integration and optimization (Vercel AI SDK, Langchain, guardrails).
* LLM observability (Langfuse, Langsmith) for costs, latency, and regressions.
SaaS Architecture & Fullstack:
* End-to-end SaaS creation or refactoring of existing architectures.
* Robust APIs and backends (NestJS, Node.js) & databases (PostgreSQL, Vector DB).
* Modern frontends (VueJS, React, Nuxt, Next) & mobile applications (React Native / Expo).
* Cloud infrastructures (AWS, Supabase, Scaleway).
Product Engineering & Tech Lead:
* Product scoping, technical roadmap definition.
* Best practices (Clean Architecture, TDD, Swagger documentation).
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⚙️MY STACK:
AI & Agents
: Vercel AI SDK, Langfuse, Langchain, OpenAI/Anthropic, Vector DBs, RAG.
Backend
: Node.js, TypeScript, NestJS, Express, Python.
Frontend
: Vue.js, Nuxt, React, React Native, Expo.
DB & Cloud
: PostgreSQL, Supabase, AWS, Digital Ocean, Scaleway.
Practices
: TDD (Jest), Clean Architecture, CQRS, CI/CD.
Let's build the next technological leap for your product together. Let's discuss your needs!
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- WeWebAI & Software EngineerSOFTWARE PUBLISHINGSeptember 2024 - Today (1 year and 11 months)Rennes, FranceDesign and development of end-to-end generative AI applications (from scratch), actively contributing to the strategic repositioning of the platform as an "AI-native" product.Major achievements:- Design and deployment of a multi-agent system (15+ autonomous agents), solving complex production challenges: orchestration, context management, cost reduction, and real-time error detection.- Implementation of the LLM observability pipeline with Langfuse, ensuring a high-velocity delivery cycle without performance regressions and test-driven AI development (TDD).- Direct collaboration with the CTO to define the AI product roadmap in an international development environment (English).Technical Stack: Node.js, TypeScript, Vercel AI SDK, Langfuse, AWS, Vue.js, PostgreSQL, TDD, unit tests.
- TractrTech Lead AI & SaaSSOFTWARE PUBLISHINGOctober 2023 - August 2024 (9 months)Montréal, CanadaDesign and development of complex SaaS projects and technical lead for AI/LLM topics.Major achievements:- Architecture and delivery of an advanced end-to-end GenAI SaaS product for a Quebec real estate leader.- Design of hybrid multi-agent workflows Vision (OCR) + NLP (Agents & RAG) for unstructured data extraction, classification, and named entity recognition.- Implementation of guardrails and evaluation pipelines to monitor the overall performance of workflows, allowing non-technical teams to safely modify prompts and autonomy levels.- Complete migration of the backend architecture from Xano to Supabase, document management (AWS S3), and automated processing via AI job scenarios.Technical Stack: Node.js, TypeScript, NestJS, Langchain, Langsmith, Supabase, PostgreSQL, Vector DB, RAG, Python, Digital Ocean, Stripe.
- AVR SOLUTIONSTech Lead Fullstack - FreelanceLOGISTICS AND SUPPLY CHAINSeptember 2022 - October 2023 (1 year and 1 month)Rennes, FranceDesign and development of critical architectures for industrial leaders.Major achievements:- Design and development of high-traffic APIs and backends for a leader in the collectible sneaker market (real-time inventory management, payments, ERP synchronization, and complex logistics).- Development of a critical business mobile application (React Native / Expo) for field technicians in the heating sector, with offline operation constraints and complex asynchronous synchronization.- Structuring of software architecture (Clean Architecture / Onion Architecture) and implementation of rigorous engineering practices (TDD, unit and integration tests).Technical Stack: Node.js, TypeScript, NestJS, React Native, Expo, AWS, PostgreSQL, Clean Architecture, TDD.
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Education
- Computer and Electronics EngineeringINSA de Rennes2019- Développement logiciel - Machine Learning - Systèmes embarqués - IoT - Analyse d'image / Vision par ordinateur - Électronique - Architecture
- Bachelor's degree in Computer ScienceUniversité du Quebec à Montreal2018- Iot - Communication 0G - Développement logiciel