Freelancer profile translated to English.
Back to original languageAbout Xavier
Data & GenAI Engineer with 7 years of experience, I help companies transform their raw data into high-value business AI products, from the data pipeline to conversational agents.
🏗️ Data Engineering & Cloud
I design and deploy scalable data architectures on GCP (BigQuery, Cloud Functions) and Snowflake: ingestion, deduplication, transformation, datamarts. I have built DWH from scratch for clients such as Empruntis, Jeune Afrique, and Pernod Ricard.
🤖 GenAI & AI Agents
I deploy AI agents in production: multi-source RAG architecture, LLM orchestration via Vertex AI, MCP (Model Context Protocol) integration to connect agents to enterprise tools. Latest project: a RAG conversational agent automating Airbnb responses for an agency managing 20 properties, with BigQuery DWH and Looker Studio dashboard.
📊 Analytics Engineering & Product
Analytics Engineering, Google Analytics 4, GTM, A/B Testing (AB Tasty, Dynamic Yield, GrowthBook, LaunchDarkly, ContentSquare). I led the experimentation strategy at Vestiaire Collective and defined the global CRO governance for Sanofi (60+ sites).
🎯 What I can do for you
• Build your BigQuery or Snowflake data warehouse
• Deploy a RAG AI agent on your internal data
• Orchestrate your LLMs (Gemini, GPT-4, Claude) via Vertex AI or LangChain
• Automate your data workflows with n8n, Cloud Functions, or Zapier
• Implement your Analytics & A/B Testing strategy
Clients: Vestiaire Collective, Sanofi, Pernod Ricard, Club Med, Harrods, Stellantis.
Available immediately · Full Remote · France & International
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Agence AirbnbData & GenAI Engineer — RAG Agent & DWHCONSULTING AND AUDITSJanuary 2026 - April 2026 (3 months)Paris, FranceDeployment of a RAG conversational agent to automate email responses to Airbnb travelers for an agency managing 20 properties.• BigQuery DWH architecture centralizing revenue and bookings per property• LLM orchestration via Vertex AI (Gemini) for contextualized response generation• MCP (Model Context Protocol) integration for agent/external tool connection• Looker Studio monitoring dashboard for profitability trackingResult: complete automation of traveler responses and real-time visibility into each property's profitability.
- ELEVATESenior Data & Tech ConsultantCONSULTING AND AUDITSOctober 2021 - December 2025 (4 years and 2 months)Paris, France4 years of consulting in Data & Marketing Technologies at Elevate, a firm specializing in supporting major clients in their data transformation.As a Senior Data & Tech Consultant, I led missions with a strong technical and strategic dimension for clients such as Vestiaire Collective, Sanofi, Pernod Ricard, Empruntis, and Jeune Afrique — covering three main areas of expertise:🏗️ Data Engineering & ArchitectureDesign and deployment of cloud architectures on GCP (BigQuery, Cloud Functions) and Snowflake. Building ingestion pipelines, transformation models, and datamarts. Setting up monitoring dashboards on Looker Studio.📊 Analytics Engineering & ProductAnalytics Engineering, GA4 implementation, GTM, Product Analytics. Collaboration with product teams to align data with roadmap decisions.🧪 CRO & ExperimentationDefinition of CRO strategies, A/B Testing backlog management (AB Tasty, ContentSquare, Dynamic Yield), reporting and statistical analysis of results.Clients supported: Vestiaire Collective · Sanofi · Pernod Ricard · Empruntis · Jeune Afrique―――――――――――――――――――――――――――――――――🛠️ Internal Project — PSA Analytics DashboardDesign and deployment from scratch of a monitoring tool for the firm's revenue and profitability tracking — by team, manager, and practice.• Automated ingestion via Cloud Functions connected to the Harvest API• BigQuery modeling (OBT tables) + calculation of operating margin (Billed vs Internal Costs)• Tracking of managerial objective achievement by team and practice• Strategic Looker Studio dashboards for associate directorsStack: GCP · Cloud Functions · BigQuery · Harvest API · Looker Studio · Python · SQLResult: complete elimination of manual reporting and real-time visibility into the firm's net profitability.
- Vestiaire CollectiveSenior Product Analyst — A/B Testing & AnalyticsLUXURY GOODSMarch 2024 - March 2025 (1 year)Paris, FranceLeading the product experimentation strategy for the Engagement perimeter (Like / Favorite features) for one of the world's leading second-hand fashion platforms.• Definition and prioritization of the A/B Testing backlog in collaboration with the Product Owner• Behavioral analysis of user data to identify optimization levers• Weekly reporting and data visualization to guide roadmap decisions• Tracking implementation for new product featuresResult: measurable optimization of user interaction and actionable data insights for the product roadmap.
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Education
- Master Data Analysis | Sup de Web CertificationsMaster Data analysis | Sup de Web Certifications
- Google Cloud Platform (GCP), BigQuery.Google Cloud Platform (GCP), BigQuery.