Freelancer profile translated to English.

Description

Analytics Engineer | BigQuery · dbt · GCP | Data Architecture & CRO

9+ years of experience in data engineering, analytics engineering, and conversion rate optimization (CRO).

Recognized BigQuery Trainer: over 1000 courses sold on Udemy and custom corporate training.

I assist large groups (Orange, Hyundai, Dior/LVMH, Galeries Lafayette, L'Oréal, 24S.com) in designing scalable, industrialized, and performance-oriented data platforms.

Analytics Engineering & Data Platforms:modeling and industrialization with dbt, data lake/warehouse architecture on GCP/BigQuery in layers (raw → processed → exposed), access governance (row/column-level permissions), transition from analytical to real-time operational.

Pipelines & Orchestration:event-driven and orchestrated pipelines on GCP (Cloud Composer/Airflow, Pub/Sub, Cloud Functions, Cloud Storage), upsert strategies (MERGE), monitoring & alerting — data reliability and freshness.

GA4 & BigQuery:GA360 → GA4/BigQuery migration, complete data processing overhaul, self-serve reporting frameworks.

CRO & Experimentation:A/B testing & personalization roadmaps (Dynamic Yield, AB Tasty, ContentSquare) with measured uplifts of +15–20%.

Tracking & Server-side:GTM server-side architecture design, multi-site & retail tagging governance.

AI & GenAI:natural language data interfaces (Python, LangChain, Vertex AI, Gemini API) for querying and visualizing data.

Key Skills:BigQuery · dbt · GCP (Cloud Composer/Airflow, Cloud Functions, Pub/Sub, Vertex AI) · Python · SQL · Data Architecture · Data Modeling · Looker Studio · GA4 · Server-side Tracking · CRO · A/B testing · Data Governance.

Languages

English
Fluent
French
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 50km), Lille (up to 50km), Lyon (up to 50km), Bordeaux (up to 50km), Marseille (up to 50km)

ORANGE
Analytics Engineer
TELECOMMUNICATIONS
September 2024 - Today (1 year and 9 months)
Châtillon, France
Main Responsibilities:
Overhaul of the enterprise Data Lake architecture on GCP, reducing query costs by 35%.
Design of a layered architecture (raw → processed → exposed) with separation of ingestion/exposure projects for governance, cost control, and impact radius reduction.
Implementation of a BigQuery access control framework (row-level & column-level permissions) to precisely define the scope and KPIs visible to each user.
Industrialization of event-driven and orchestrated pipelines: ingestion via Pub/Sub & Cloud Functions, Airflow orchestration (Cloud Composer), upsert strategies (MERGE) for status change management, monitoring & alerting via Log Router.
Automation of over 10 Airflow pipelines; improvement of data freshness.
Development of a Gen-AI interface (Python, LangChain, Vertex AI) that responds to data questions in natural language with automatic chart generation.

Tools:GCP (BigQuery, Cloud Functions, Cloud Composer/Airflow, Pub/Sub, Cloud Storage, Compute Engine, Vertex AI, Gemini API), Python, Looker Studio, DBT etc.
Airflow Composer BigQuery GCP DBT
Parfums Christian Dior
Analytics Engineer & 360° Data Analytics Lead
RETAIL (SMALL BUSINESS)
March 2023 - Today (3 years and 3 months)
Neuilly-sur-Seine, France
Examples of tasks:
- Support for migration to GA4 (BigQuery side): reconciliation with GA360 history, query redesign, dashboard migration, etc...
- Ad-hoc analyses (online/offline reconciliation, market performance studies, etc.)
- Automation (via GCP): real-time custom alert automation using Python, GA4 & BigQuery (to Slack & email)
- Complete redesign of the GA4 data processing structure on BigQuery
Microsoft Power BI GA4 BigQuery Training GCP Python
Hyundai
Lead CRO
AUTOMOBILE
July 2024 - Today (1 year and 11 months)
Courbevoie, France
Main Responsibilities:
Development of the experimentation roadmap and dynamic personalization use cases; the first 12 tests increased overall conversion by 15 to 20% year-over-year in 2025.

Tools:Dynamic Yield, GA4, BigQuery, Looker Studio, ContentSquare.
Dynamic Yield GA4 BigQuery Looker Studio ContentSquare