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Mouna El BouardiME

Mouna El Bouardi

Senior Data Engineer | GCP • DBT • BIGQUERY

€600/day
Lyon, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Mouna

Senior Data Engineer | GCP • DBT • BIGQUERY | Modern Data Stack

Senior Data Engineer with 8 years of experience, specializing in GCP, BigQuery, and DBT.

Graduated Computer Science Engineer in Business Intelligence, with expertise covering the entire data value chain, from Business Intelligence to cloud data platform architecture.

I assist companies in designing, modernizing, and optimizing their data platforms, from ingestion to visualization.

I work on high-volume data environments with challenges of scalability, reliability, and performance.

My expertise:
• Data Engineering & ELT: design and industrialization of robust pipelines (dbt, Talend, Python)
• Cloud & Data Platform (GCP): BigQuery, Cloud Run, Cloud Scheduler, Cloud Storage, Cloud Composer, Terraform
• Data Modeling & Data Warehousing: data marts, star schemas, performance-oriented structuring
• Business Intelligence: creation of dashboards and decision support tools (Tableau, Power BI, Looker Studio)

What I bring:
• Strong autonomy and ability to deliver quickly
• End-to-end vision of data projects
• Reliable, scalable, and business-oriented solutions

📍 Based in Lyon | Open to remote
📩 Available quickly for freelance missions

Skills: dbt · GCP · BigQuery · Python · Terraform · Tableau · Power BI
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Lyon (up to 50km), Paris (up to 50km), Genève (up to 50km), Lille (up to 50km), Toulouse (up to 50km)

Experience

  • Île-de-France Mobilités
    Senior Data Engineer
    TRANSPORTATION
    October 2024 - Today (1 year and 10 months)
    Migration Data Platform to DBT & GCP

    Migration and modernization of a legacy decision-making platform to a modern cloud architecture based on Google Cloud Platform (GCP), BigQuery, and DBT for a major player in the transport sector.

    • Design and development of ELT pipelines on GCP and BigQuery.
    • Data Warehouse modeling and implementation of DBT models (Bronze, Silver, Gold).

    • Migration of legacy processes and integration of existing business rules.

    • Optimization of BigQuery performance and costs through partitioning, clustering, and SQL optimization.

    • Implementation of Infrastructure as Code with Terraform and industrialization of deployments.

    • Industrialization and orchestration of processes via Cloud Run, Cloud Scheduler, and Artifact Registry to automate the execution and deployment of data pipelines.

    • Migration of BI dashboards (Tableau) to the new platform.

    • Support for business teams during functional acceptance testing and production deployment.

    Environment: GCP (BigQuery, Cloud Run, Cloud Storage, Cloud Scheduler, Artifact Registry), DBT, Python, Terraform, SQL, Tableau, GitLab CI/CD, Docker.
    Google cloud Big Query DBT Composer Terraform
  • Île-de-France Mobilités
    Data Engineer
    TRANSPORTATION
    January 2022 - September 2024 (2 years and 8 months)
    Lyon, France
    DWH & ELT Pipelines Redesign (Talend, Tableau, SQL)

    Redesign and optimization of the Data Warehouse (DWH) for a major player in the transport sector in France, to improve data quality, process performance, and reliability of decision-making reporting.

    • Design and evolution of the decision-making data model (facts, dimensions, aggregates) to meet analytical and business needs.

    • Development and maintenance of integration pipelines under Talend for feeding the Data Warehouse from multiple data sources.

    • Implementation of data control and validation mechanisms: anomaly detection, management of integration discrepancies, and automation of error data recycling.

    • Optimization of ETL processes and SQL queries to improve the overall performance of the decision-making platform.

    • Development and evolution of Tableau dashboards for activity monitoring and business indicator tracking.

    • Participation in production deployments, user support, and incident resolution.

    • Technical supervision of interns and onboarding of new team members.

    Environment: Talend, SQL, PostgreSQL, Tableau, Data Warehouse, Decision modeling, Jira, Confluence.
    ETL/ELT Talend MySQL PostgreSQL Tableau software
  • Engie Home Services
    BI & Data Engineer
    ENERGY AND UTILITIES
    October 2019 - December 2021 (2 years and 2 months)
    Lyon, France
    Reporting & BI Models Redesign

    Redesign of the reporting module for a call routing management solution for contact centers of a major player in the energy sector, with the goal of improving data exploitation and activity monitoring.

    • Gathering and analysis of business needs through functional workshops with stakeholders.

    • Definition and implementation of performance indicators (KPIs) and associated calculation rules.

    • Design and development of reports and dashboards based on the platform's operational data.

    • Optimization of processes and queries to improve performance and response times of restitutions.

    • Participation in acceptance testing, production deployment, and post-deployment monitoring.

    • Training and support for users in adopting new reporting.

    Environment: JasperReports, MongoDB, SQL, Business Intelligence Reporting.
    ETL/ELT Reporting KPI MongoDB JasperReport

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Education

  • Engineering degree
    ISIMA - Clermont Auvergne INP
    2017
    Diplôme d'ingénieur
  • Engineering degree
    ENSIAS - Ecole Nationale Supérieure d'Informatique et d'Analyse des Systèmes
    2015
    Diplôme d'ingénieur

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