Freelancer profile translated to English.
Back to original languageAbout Nelson
Analytics Engineer | dbt · BigQuery · Python · Looker Studio · Power BI
I transform raw data into strategic assets from ingestion to dashboard.
Specifically, I work on:
- Building reliable pipelines (MySQL → BigQuery, incremental ingestion via Python + Cloud Functions) with a track record of reducing processing costs by 10% to 30%.
- Data modeling with dbt to structure a clean, documented, and business-aligned data warehouse.
- Data auditing (quality, consistency, anomalies) so teams can trust their numbers.
- Visual reporting via Looker Studio and Power BI dashboards designed for decision-making.
- Facilitating a data-driven culture. I don't just deliver tables; I help teams use them.
I work on both from-scratch projects (0 → data stack) and on existing environments that need to be stabilized or evolved.
Portuguese
Fluent
Spanish
Fluent
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Bordeaux (up to 20km), Lyon (up to 20km), Marseille (up to 10km), Lille (up to 20km)
Experience
- FreelanceAnalytics EngineerNovember 2024 - Today (1 year and 8 months)Design and deployment from scratch of automated data pipelines (MySQL → BigQuery) using Python, orchestrated with Google Cloud Functions. Daily incremental ingestion, reducing processing costs by 10% while improving overall performance.Implementation of robust data warehouses with DBT to centralize, validate, and structure data according to business needs.Comprehensive data audit (quality, consistency, availability) to secure analyses and detect critical anomalies.Development of interactive and custom dashboards (Looker Studio, Power BI) to provide teams with a clear, real-time view of their activity.Strategic support towards a data-driven culture, with concrete and immediately actionable use cases for operational teams.
- Le WagonTeacher - Data AnalystEDUCATION AND E-LEARNINGFebruary 2024 - Today (2 years and 5 months)Training of 400+ students in data fundamentals: SQL, Python, DBT, data visualization (Power BI, BigQuery).Daily support, simplification of key concepts, and live bug resolution.
- SeastemikData AnalystCIVIC AND SOCIAL ORGANIZATIONSFebruary 2024 - Today (2 years and 5 months)- Data collection and cleaning
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Education
- Data AnalystLe Wagon2023
- Professional Bachelor's Degree in Management of OrganizationsEvry2015
Certifications
- Data AnalystLe Wagon2023