Lucien M.

Fullstack freelance developer with 4+ years designing, building and shipping web applications and SaaS products to production for startups, SMBs and large enterprises. I also run a company focused on AI applied to industrial automation. Around ten products delivered in production: HR, education, e-commerce, industry.

Available 2 to 4 days per week, embedded in your team or working autonomously.

- Design and development of MVPs and SaaS products (B2B, B2C)

- Refactoring and migration of existing applications (version upgrades, modular redesign, technical debt)

- LLM and domain-specific chatbot integration into existing products

- Internal process automation and data extraction pipelines

- Headless CMS setup to decouple content and frontend

- Internal tools, web scraping and analytics instrumentation

Scalable architectures with FastAPI (Python) and Node.js, Postgres persistence via Supabase. Kubernetes deployments on Azure, AWS and GCP, CI/CD, observability. Strapi as a headless CMS, serverless functions, document processing (OCR, structured extraction, PDF conversion). REST and asynchronous API design, job queue management, idempotency and error recovery.

Conversational AI agents with LangChain and LangGraph, multi-step orchestration, tools and persistent memory. Vector databases for semantic search and RAG, GPT and Gemini integration. Domain chatbots, assistants augmented with your internal data, structured extraction from PDFs and images. Evaluation, tracing and guardrails: the goal is a production product, not a PoC that never leaves the notebook.

Interfaces with Nuxt, Vue.js and React — from marketing sites to complex SaaS: embedded editors (TipTap, Monaco), data visualization, Stripe integration, SSR and Core Web Vitals optimization.

Got a project in mind? Let's talk for 30 minutes.