Freelancer profile translated to English.
Back to original languageAbout Jonathan
🎯 Senior Data Analyst freelance, I help companies leverage their data to generate measurable business impact. With over 5 years of experience in various contexts (retail, real estate, media, banking, automotive), I handle strategic data projects from start to finish.
💼 My missions at Decathlon, Brut, SeLoger, LBPIC, BMW, and Jardiland (through a consulting firm) allowed me to:
• Deploy **high ROI use cases**, such as a birthday campaign for Decathlon generating over €3M in revenue.
• Supportproduct, marketing, and C-level teamson their data challenges and roadmap creation: churn, onboarding, lifetime value, scoring, market benchmarks.
•Automatebusiness needs through interactive dashboards (Looker, Tableau, RShiny) by making teams autonomous.
• Simplify insights for media and partners (journalists, DPO, business unit managers).
• Work in agile environments withmultidisciplinary teams(Scrum, Jira, Confluence).
🧠 Key Skills:
• Data analysis & modeling: Python, R, SQL, DBT
• Data visualization & self-service BI: Looker, Tableau, RShiny
• Cloud environments & tools: GCP, Databricks, AWS (Jupyter), SQL Server
• Marketing campaign tracking: Adobe Analytics, Datorama, Ads Manager
🌍 Languages: French (native), English (TOEIC 890), Spanish (school level)
French
Native or bilingual
English
Fluent
Spanish
Conversational
Can work on-site
Paris (up to 50km)
Experience
- Decathlon TechnologySenior Data AnalystSeptember 2022 - September 2024 (2 years)Paris, FranceWithin the customer knowledge team, I support business teams on various topics:
- Calculation of user value for digital products (Decathlon Coach, Activity, Outdoor) to support CEOs on their business models.
- Development of the marketing strategy around churn prevention (opportunity sizing, lever identification, and prioritization) and customer onboarding.
- Implementation and analysis of campaign A/B tests to validate strategy, monitoring opportunity sizing for international deployment.
- Development of self-service dashboards to empower business teams (PMs, squad leaders).
- Development of a method for calculating plastic pollution at an international level, a world first.
- Support for the DPO in complying with GDPR.
- Brut.Senior Data AnalystPRESS AND MEDIAFebruary 2022 - September 2022 (7 months)Paris, FranceWithin the data insight team, I support the development of the data structure:- QA of data on GCP- Development of SQL scripts- Creation of the first dashboards on Looker for Brut. content on social networks.I also work with marketing teams by creating dashboards to track paid campaigns across all social networks (Facebook, Instagram, TikTok, Snapchat...) through the stages of scoping, development, and democratization of dashboards.
- SeLogerData ConsultantFebruary 2019 - May 2021 (2 years and 3 months)Paris, FranceResponsible for data valorization within the real estate leader.
- Implementation of benchmarks on the group's various verticals with marketing managers (scoping, development, dissemination).
- Ad-hoc analysis of the real estate market.
- Participation in the migration of SQL server to their data lake.
- Valorization and simplification of group data for the media (journalists, editorial team, partnerships with external structures) through the creation of new data products (market reports, user flows, profitability calculations).
- Development of a 3 to 6-month roadmap for a data team.
- Scoring of clients based on their appetite for a boost product.
- Implementation of imputation for the number of rooms and surface area for a monthly communicated benchmark.
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Education
- Engineering degree - specialization in marketing and revenue managementEcole nationale de la Statistique et de l'Analyse de l'Information2018Statistiques
- Preparatory classes for Grandes Ecoles (CPGE): MPSI, MPLycée Leconte de Lisle2015Classes Préparatoires aux Grandes Ecoles (CPGE): MPSI, MP