Senior Fullstack AI Engineer — B2B SaaS, LLM systems & agentic workflows

I design and ship production AI products end to end: architecture, frontend, APIs, data, cloud, testing and observability.

Lumelia · LinkedIn · PixelLight · Email

Four projects. Four engineering principles. Your turn to explore.

Visit the stations, inspect the evidence, recover a workflow, validate a draft and test a provider fallback.

Enter the interactive lab →

_{Educational mini-games with synthetic data. No live model calls, no real publications, no production performance claims.}

• Production LLM features and agentic workflows with structured outputs, multi-model routing, fallbacks, cost control and monitoring
• Fullstack B2B SaaS products using React, Vue 3, Next.js, TypeScript, Node.js and Python
• Reliable APIs and data systems with PostgreSQL, asynchronous processing and AWS
• Senior product reinforcement for architecture, performance, technical debt, testing and delivery

I build measurable, maintainable product capabilities—not demo-only chatbots.

Multi-tenant WhatsApp AI SaaS built with Next.js, PostgreSQL, Prisma and Twilio. Includes LLM intent routing, structured conversation flows, real-time updates, CI and automated tests.

Platform for building, running and observing agentic workflows. NestJS and React applications, Python workers, BullMQ, PostgreSQL and OpenTelemetry.

Fullstack AI content platform with an Analyst → Stylist → Builder → Critic workflow, checkpoints, quality loops and recovery paths.

Production SaaS for AI image generation and editing, with multi-provider workflows, usage credits and operational monitoring.

• Seyna — Node.js/Python APIs and an AWS data pipeline processing more than 5 million records per month
• Daspren — complete Vue 3/TypeScript SaaS frontend rebuild
• Arcane — Tech Lead across React/TypeScript applications and Python microservices

TypeScript · Python · React · Vue 3 · Next.js · Node.js · PostgreSQL · AWS · LLM systems · Agentic workflows

Available for senior B2B freelance and contract missions through my SASU, remote across France/Europe with occasional hybrid work in Paris.