Freelancer profile translated to English.
Back to original languageAbout Léo
Missions sought: Freelance primarily. Less than 1 year in Bordeaux or long-term full remote
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Data Engineer with 7+ years of experience, specializing in real-time analytics, data pipelines, and performance optimization.
After five years in data engineering, I chose freelancing to continue self-taught progress and broaden my scope, particularly through my personal research in sound design and generative art. I now apply my rigor and adaptability to demanding and innovative data projects.
Expertise: Python • SQL • Snowflake • ClickHouse • MariaDB • Airflow • Talend • Tableau • Grafana • Data Modeling • ETL/ELT
> Find my CV at meo-mumu.io
French
Native or bilingual
English
Fluent
Can work on-site
Bordeaux (up to 50km)
Experience
- BetclicData engineerENTERTAINMENT AND LEISURESeptember 2024 - May 2025 (8 months)Bordeaux, France🔹 Data Pipelines & Infrastructure- Development and maintenance of SQL pipelines on Snowflake- Workflow orchestration via Apache Airflow and Talend (hosted on AWS)- CI/CD via GitHub🔹 Optimization & Modeling- Optimization of SQL queries on large volumes- Data modeling for new data products🔹 Industrialization Projects- Industrialization of casino player segmentation- Industrialization of casino game volatility calculation🔹 Business Intelligence- Creation of Tableau dashboards for business KPI monitoring- Automation of Excel reports📊 Data handled: Online casino and poker player behavior
- MCMA-SolutionsData engineerENERGY AND UTILITIESOctober 2023 - April 2024 (7 months)Bordeaux, France🔹 Achievements- Migration of legacy architecture to a modern stack- Development of modular Python pipelines for real-time data ingestion and transformation- Progressive migration without service interruption- Performance optimization🔹 Final technical stack- Python pipelines- Mage AI orchestration- Databases: MariaDB, ClickHouse- S3 storage- Real-time Grafana dashboards
- Mc MA SolutionsData EngineerENERGY AND UTILITIESMarch 2017 - December 2021 (4 years and 9 months)Bordeaux, France🔹 Context & Mission- Creation of the data department from scratch with the CEO and a colleague in a startup team (<10 people)- Objective: Energy monitoring (consumption and costs) for large public and private clients- Collection, storage, calculation, and visualization of real-time energy data🔹 Data handled- Millions of real-time energy consumption points (electricity and gas meters)- Energy bills (multi-format PDF parsing from 20+ providers)- External data: weather, energy prices, contracts, client infrastructure🔹 Use cases developed- Forecasts of future energy bills- Simulations of contract changes by pool of delivery points- Cross-analyses: contracts vs bills vs real-time consumption- Real-time display on interactive client application🔹 Architecture & Technical Stack- Design and development of data microservices (REST API)- Talend ETL orchestrated by Scala/Akka framework (streaming)- Java backend- Databases: MySQL, Elasticsearch- Real-time Grafana dashboards- CI/CD via GitLab🔹 Management & Client Relations- Supervision of 2 interns- Development of product roadmaps- Client follow-up and business needs analysis📊 Domain: Energy & Environment | Real-time monitoring | Predictive analytics
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Education
- Computer Science and Statistics Engineer (with Erasmus in Poland in the final year)Polytech'Lille, Politechnika Lodz2017Un tiers d’informatique (bases de données ingénierie logicielle, bases de données, Java, C, . . .), un tiers de statistique (probabilités, algorithmique numérique, classification, processus stochastiques, R, Python, . . .), un tiers de sciences humaines, économiques, juridiques et sociales (protection et usage des données, informatique et développement durable, . . .).
- University Institute of Technology in Statistics and Decision Support IT (STID)Paris Descartes2014