Freelancer profile translated to English.
Back to original languageAbout Alexandre
AI Engineer with 6 years of experience. LLM systems in production for over 2 years. I design business expert agents with the right tools and integration level to maximize domain value.
My approach: start with the business problem, design the agent scaffold (prompt + tools + integration), build the data infrastructure, and deliver a finished product — from GPU document parsing to pixels in the browser. No ChatGPT wrappers: custom agentic systems, no framework, with mastered function calling.
What I've built:
→ Legal modeling agent (Lefebvre Dalloz, 2.5 years)
SaaS for drafting legal documents, ~1,000 active users/month, large clients, 99.9% SLA. The problem: legal professionals cannot model a complex business database on their own. My solution: an AI agent that maintains the data model for them — integrated assistant in the editor, custom modeling format, verification engine, specialized tools. In parallel: migration from Java legacy to TypeScript (2,000+ procedures, 22,000+ variables, big bang in 18 months), LLM evaluation & observability, 10+ microservices infrastructure on Kubernetes AWS.
→ Regulatory exploration agent (urba.archi, 7 months)
AI platform for architects and urban planners, entrepreneurial project, solo on tech, 40 beta testers. Large-scale agentic search: 10M chunks indexed, 100-150ms latency, semantic chunking precise enough to forgo re-ranking. GPU parsing pipeline: 10,000 pages in 6-7 min (layout analysis, OCR, embeddings). Optimized cloud cost: €400/month for 120,000 pages.
Stack: Rust, TypeScript, React, Node.js, Python, PostgreSQL/pgvector, Kubernetes.
Solid infrastructure: Docker, AWS, Scaleway, GitHub Actions, Sentry, OpenTelemetry, Grafana.
Paris. Available immediately. Long-term missions preferred (6+ months).
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 10km), Paris (up to 10km)
Experience
- urba.archiAI Engineer / Full-Stack DeveloperARCHITECTURE AND URBAN PLANNINGSeptember 2025 - March 2026 (6 months)Paris, FranceAI platform for architects and urban planners: aggregation of urban regulations (PLU, natural risks, cadastre), semantic search, and agentic assistant. Entrepreneurial project with a business partner, solo on tech. 40 beta testers.What I built:• Specialized urban planning agent: regulatory exploration in natural language with verifiable citations and sources. The agent generates interactive components (reports, forms, compliance widgets), not just text.• Large-scale agentic search: 10M chunks indexed, 100-150ms latency, exhaustive embeddings benchmark (Voyage selected), semantic chunking precise enough to forgo re-ranking.• GPU document parsing pipeline: 10,000 pages in 6-7 min (layout analysis MinerU VL, OCR PaddlePaddle, semantic reconstruction Gemini Flash, embeddings). Multi-worker distributed architecture.• AI-driven mapping engine: user configures in natural language, agent translates into map controls (layers, filters, zoom).• Cloud cost optimization: €400/month for 120,000 pages (scale-to-zero, spot instances, intelligent scheduling).Stack: React, TanStack Start, Node.js, TypeScript, Python, PostgreSQL/pgvector, Redis, Kubernetes (Scaleway).
- Lefebvre DallozSoftware Architect – Senior ConsultantSOFTWARE PUBLISHINGJanuary 2023 - August 2025 (2 years and 7 months)Nancy, FranceSaaS for drafting labor law documents. ~1,000 active users/month, 5,000-10,000 documents generated/month. Large clients (notaries, lawyers, HR). 99.9% SLA maintained.Problem solved: legal professionals cannot model a complex business database on their own (conditional variables, dependencies, formulas). My solution: the AI agent maintains the data model for them.What I built:• Specialized legal modeling agent: integrated assistant in the editor, reads business schema, variabilizes text, creates conditional blocks via function calling. Custom modeling format, verification engine, specialized tools.• LLM evaluation & observability: custom scoring tools, LLM-assisted monitoring of relevance. Largest AI project.• Reactive document drafting engine: rich text editor synchronized with legal modeling engine, blanks, conditional blocks, calculated formulas, auto-fill.• Java legacy → TypeScript migration: 2,000+ procedures, 13,500 documents, 22,000+ variables migrated. Controlled big bang in 18 months.• AWS Serverless: Lambda + ECS architecture, event-driven, automatic scaling, cold start optimization.• SSO Group Auth: integration with Lefebvre Dalloz identity federation, multi-tenant permission management.Infrastructure: 10+ microservices, TypeScript monorepo, Kubernetes AWS, CI/CD GitHub Actions (<10 min from tag to live), Sentry + OpenTelemetry + Grafana.Daily: bilateral code reviews, pair programming, hands-on infra workshops for the team.
- 410 Gone | 410-gone.frSoftware Engineer – Fullstack DeveloperE-COMMERCENovember 2021 - October 2022 (11 months)Lyon, FranceE-commerce/SEO agency (Lyon). Introduction of React and Node.js in a historically PHP environment (Magento, PrestaShop).What I built:• Custom CMS with SSR: React + Tailwind block architecture, custom dev server, optimized bundling. SSR and image optimization guaranteed by design.• Online training platform: ~100 users, complete back-office, MCQs, video transcoding, PDF reports, mailing. Qualiopi certification obtained.• Infrastructure modernization: 10+ Magento sites Dockerized, Kubernetes deployment.Stack: React, Node.js, TypeScript, Tailwind, MongoDB, Docker, Kubernetes.
Reviews
Patrick
410-gone.fr
Reviewed on 12/17/2021
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