Freelancer profile translated to English.
Back to original languageAbout Quentin
Senior Data Engineer with over 10 years of experience, I specialize in industrializing data processing, optimizing pipelines, and deploying robust solutions.
I primarily work with Spark / Scala, Python, SQL, Airflow, BigQuery, and Hadoop/Cloudera environments, with a strong focus on performance, reliability, maintainability, and production operations.
My background also allows me to bring a dual expertise in data and web development. I have designed and evolved business applications in Java / Spring / Angular, often directly linked to data processing, relational databases, and monitoring or integration issues. This cross-functional perspective allows me to better connect data pipelines with concrete business use cases.
I have worked in large enterprises with complex IT systems as well as in more agile contexts, tackling subjects ranging from legacy system migration to critical process optimization, and even technical team leadership. At Enedis, I optimized and improved the reliability of big data processing chains, achieving significant performance gains on certain jobs, while maintaining a strong link with the business applications that use them.
What I bring to missions:
- Industrialization and reliability of data pipelines
- Spark / SQL / BigQuery performance optimization
- Development of backend components and APIs around data
- Seamless interface between data, product, and application development teams
French
Native or bilingual
English
Fluent
Can work on-site
Lyon (up to 50km)
Experience
- PulseLife (ex 360 medics)Data Engineer / BIMEDICALFebruary 2026 - March 2026 (1 month)Lyon, France
- Migration and reliability improvement ofdata pipelinesandmarketing reportson GCP environment.
- Development ofPythonprocessing, orchestration with Airflow, andBigQuerytable optimization to enhance reliability and control costs.
- Design ofLooker Studiodashboards to facilitate data utilization by business teams.
- EnedisData / Web Tech LeadENERGY AND UTILITIESJanuary 2024 - August 2025 (1 year and 7 months)Lyon, France
- Technical leadership of apredictive maintenanceproject combining industrialized data processing, **PostgreSQL**, and a business web application.
- Legacy system migration, impact analysis, reliability ofproduction/pre-productionchains, and continuous improvement in a complex IT environment.
- Technical supervision of7 developersand optimization of critical processes, reducing a daily job from **6h to 1h30**.
- Jacquet MetalsOpenSearch ConsultantENERGY AND UTILITIESDecember 2023 - January 2024 (1 month)Saint-Priest, France
- Short-term mission to optimize asearch engineintegrated into an internal ERP.
- Improvement of textual search relevance through the configuration ofanalyzersand **boosted fields**.
- Support for development teams on best practices for buildingOpenSearchqueries.
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Education
- PhD in Applied StatisticsUniversité Claude Bernard Lyon 12016Doctorat consacré à la modélisation spatiale de valeurs extrêmes, appliquée à l’étude des précipitations en France, dans le cadre d’un projet financé par EDF. Collecte, nettoyage, analyse et modélisation de données de pluviométrie issues d’une centaine de stations météorologiques, avec comparaison de plusieurs approches statistiques. Développement d’un package R publié sur le CRAN (hkevp) et publication d’un article scientifique dans la revue Spatial Statistics.