Mathieu Voirgard

Support in scoping responses to Data Architecture tenders for major enterprise clients. • Evaluation and recommendation of target architectures: Snowflake, Data Catalog, Data Lineage • Recommendations on ETL stack choices and Data Mesh patterns • Writing technical responses for tenders Domains : Snowflake, Data Catalog, Data Lineage, Data Mesh, ETL

Design and deployment of the new data platform (Data Architecture 2.0) for an international group of 30,000+ employees, replacing the legacy on-premise infrastructure. Adecco Data Architecture 2.0 Project : • From-scratch design of a cloud Data Lake with Azure Data Factory, Airbyte, dbt, Airflow, Terraform, Snowflake and PowerBI • Implementation of orchestration, versioning and CI/CD for all data pipelines • Industrialisation of ingestion flows to cover new use cases impossible on the legacy platform • Setup of a POC on AWS to compare solutions Oracle Exadata Migration : • Led the migration of the existing infrastructure to Oracle Exadata • Result: significant reduction in licence costs and improved ingestion and reporting performance Near Real-Time Business Intelligence Ingestion: • Design of ingestion flows: Salesforce → Oracle → MicroStrategy cubes • Modelling optimisation to ensure high availability and optimal performance across the entire chain • Delivery of new business KPIs to end users Technical Leadership: • Training and upskilling of the BI/Data team on new paradigms (Data Lake, dbt, Airflow) • Cross-functional role: implementation of development standards, performance-oriented modelling best practices, code reviews Stack : Python, Spark, Snowflake, Azure Data Factory, Airbyte, dbt, Airflow, Terraform, PowerBI, Oracle, ODI, MicroStrategy, Salesforce, Git, CI/CD

Responsible for the stability, performance and evolution of the group's entire data platform (Oracle, MicroStrategy, Tableau, Essbase, ODI). Architecture Security & Migration: • POC for database migration (Snowflake, Teradata, Exadata, Vertica) with full benchmark of the ETL chain + MicroStrategy reporting • In-depth evaluation of costs / complexity / effort to define the long-term migration strategy Data Science : • Support and maintenance of churn prediction models (machine learning, Knime, Python, R) New Use Cases: • Development of a ChatBot via the MicroStrategy API • API integration between applications (Salesforce, MicroStrategy, mobile BI application) Audit & Security: • Responsible for auditing, remediation and security of the entire data stack Stack : Oracle, MicroStrategy, Tableau, Essbase, ODI, Snowflake, Teradata, Exadata, Vertica, Azure, Python, R, Knime, Salesforce API

Senior consultant working with major accounts in the energy, insurance and mutual insurance sectors Modelling & Performance: • Database modelling optimisation for MicroStrategy reporting environments • Weekly client team support over several months to build robust and high-performing data models Standards & Best Practices: • Implementation of development standards and BI best practices aligned with group guidelines • Ensuring data quality and consistency of delivered solutions Training: • Creation of customised training guides for MicroStrategy developers, power users and clients Stack : MicroStrategy, SQL Server, PostgreSQL, Oracle, Exadata