Mathieu Berthier

• Cleaning, harmonizing, and securing network data to ensure smooth integration with business systems. • Designing and developing the transformation layer using DBT Cloud, with a Data Warehouse hosted on BigQuery. • Overseeing raw data ingestion pipelines through Airbyte. • Building Power BI dashboards to provide clear and actionable KPI visibility. • Collaborating with internal teams to improve data governance and optimize analytical models. 🎯 Impact: improved network data quality, better integration with business tools, and enhanced visibility through reliable KPIs

• Designed and deployed data governance strategy in collaboration with data owners • Mapped key data assets and supervised functional & technical documentation in Collibra • Facilitated internal data & AI use case valorization through workshops • Animated the data community and promoted cross-team knowledge sharing • Contributed to legacy data systems rationalization and improved overall data quality

• Managed the BigQuery Data Warehouse for the Analytics team • Implemented a company-wide self-service analytics platform • Built and orchestrated data pipelines using DBT (Core & Cloud), GCP Cloud Functions & Cloud Scheduler • Integrated external data sources via Airbyte and custom Python connectors • Created interactive dashboards using Looker Studio and Preset (Apache Superset) • Monitored data quality and maintained DBT documentation 🎯 Impact: Enabled business teams to gain autonomy, improved insight reliability, and reduced time-to-analysis for product and client data.

• Built data warehouses to deliver a 360° view of insurance products and clients • Developed data pipelines with Spark (Scala, PySpark) and automated workflows in Dataiku DSS • Defined scenarios, deployed projects with bundles, and handled production releases • Conducted technical testing, updated specifications, and produced project documentation • Supported delivery planning and authored best practice guidelines for Dataiku usage 🎯 Impact: Improved marketing data quality, reduced data silos, and accelerated analytics workflows.

Skills: Python · Data Science · SQL

• Analyzed SEO performance of Pages Jaunes website (traffic, ranking, structure) • Managed and updated SEO datasets in Hadoop • Built dashboards in Tableau to support weekly/monthly reporting and decision-making • Conducted data scraping and cleaning for web intelligence 🎯 Impact: Accelerated availability of key SEO KPIs, supported optimization initiatives for product managers.

• Managed a portfolio of enterprise SEO/SEA clients • Designed on-site/off-site SEO strategies and conducted audits & technical support during website migrations • Drafted SEO-friendly specifications, benchmarks, and reports • Ran Google Ads and Bing Ads campaigns; optimized keywords, structure, landing pages • Tracked performance using Google Analytics, Xiti, and Omniture • Led pre-sales and cross-selling initiatives, contributed to strategic proposals 🎯 Positioning: Hybrid role combining strategic consulting and hands-on execution in digital acquisition.

• Executed SEO strategies across group websites (Promovacances, Partir Pas Cher, UnMonde) • Optimized technical SEO, semantics, and link building • Drafted specifications for site section redesigns and CMS implementation • Conducted SEO monitoring and competitive watch