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Nelson CarvalhoNC

Nelson Carvalho

Analytics Engineer | DBT | GCP

€350/day
41 projects
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About 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

  • Freelance
    Analytics Engineer
    November 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 Wagon
    Teacher - Data Analyst
    EDUCATION AND E-LEARNING
    February 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.
    SQL DBT Python Looker Studio Microsoft Power BI Machine Learning
  • Seastemik
    Data Analyst
    CIVIC AND SOCIAL ORGANIZATIONS
    February 2024 - Today (2 years and 5 months)
    - Data collection and cleaning
    Data Collection Data Cleaning Data Cleansing Data Analysis

Reviews

4.8

Out of 27 ratings

M

Mehdi

sos baggage

Reviewed on 4/27/2021

Very good initial contact. I had a good time in your company. Everything was done by the book ;-). I highly recommend you. Thanks again!

Nelson has chosen to hide 13 reviews

13 written reviews are private.

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Education

  • Data Analyst
    Le Wagon
    2023
  • Professional Bachelor's Degree in Management of Organizations
    Evry
    2015

Certifications

  • Data Analyst
    Le Wagon
    2023

Skill set

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