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Sarah G.SG

Sarah G.

Data Analyst - Power BI - SQL - DATASTAGE

€500/day
Lyon, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sarah

🔹 Do you have a one-time data need?

I help you structure, correct, and leverage your data, even the most complex. As a passionate Data Engineer, I bring my 9 years of experience to technical and functional missions.
SQL, Power BI, ETL (Datastage, Talend), modeling, DWH (Oracle, Teradata), anomaly detection: I leave nothing to chance.


🔹 My approach:
Combine solid technical skills with business understanding to deliver reliable, documented, and understandable solutions.
My rigor is formidable, and my ability to get to the heart of the matter will save you time.

🔍 Missions I am looking for – evenings & weekends (full remote)
✅ Data quality audit, anomaly detection
✅ Advanced SQL processing & querying
✅ Data integration / flows (ETL, DWH)
✅ Dashboard design (Power BI)
✅ Translation of business / technical needs
✅ Writing clear and useful documentation

🧠 Key Skills


Data & BI:
Exploratory analysis & anomaly detection
Interactive Power BI dashboard design
Consistency audit (SQL, Excel, logs, etc.)
ETL & Integration:
Datastage, Talend flow development
Advanced SQL, historization, DWH (Oracle, Teradata, PostgreSQL)
Data structuring and normalization


Knowledge Transfer:


Tutoring apprentices
Writing technical & simplified documentation
University teaching (Big Data)

⚙️ My strengths
🧠 Analytical thinking and attention to detail
📊 Structured and rigorous mindset
💬 Excellent technical/business communication
📚 Natural pedagogy and passion for knowledge transfer
🚀 Autonomy, reliability, efficiency


Available quickly for short but high-impact missions.
I work fully remotely, in the evenings and on weekends, with the same level of requirement as for a daytime mission.
  • French

    Native or bilingual

  • English

    Conversational

Remote only
Primarily works remotely

Experience

  • Fédération Agirc Arrco
    Data Engineer
    BANKING AND INSURANCE
    January 2019 - Today (7 years and 4 months)
    Lyon, France
    Analyze functional and technical needs.
    Develop and maintain data integration processes. Model and populate data warehouses and data marts.
    Data historization and full/delta loading.
    Perform functional tests to ensure data and process quality.
    Dashboard design.
    Datastage SQL ELT Microsoft Power BI Teradata
  • DIMOTRANS
    Data Manager
    TRANSPORTATION
    April 2022 - February 2024 (1 year and 11 months)
    Pusignan, France
    Managed a team of 3 people.
    Built a BI architecture.
    Modeled and populated data tables.
    Managed and performed functional analysis of business data:
    - Accounting
    - Operations
    - Sales
    Used data from INSEE APIs (Postman).
    API Data Architecture SQL Talend Qlik
  • LA POSTE
    Client Knowledge Officer
    BANKING AND INSURANCE
    September 2016 - August 2018 (2 years)
    Lyon, France
    Created marketing campaigns (phone, email...) using Néolane Adobe Campaign:
    - Extracted data from the database
    - Transformed data according to specific filtering criteria (in SQL)
    - Loaded data into Néolane to distribute targets

    Developed automated dashboards:
    - Developed the tool in Excel (VBA macros) and Access (SQL)
    - Developed the dashboard in TABLEAU Software, QlikView, or Excel

    Descriptive Statistical Studies using Excel and Access (SQL) and Text Mining using Rstudio.
    Marketing campaign B2B Database Tableau software Microsoft Excel

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Education

  • Master's Degree in Computer Engineering - DATA Track
    EPSI Campus RenéCASSIN Lyon 09
    2020
    BAC+5
  • Professional Bachelor's Degree in SIGD: Big Data Track
    I.U.T. 2 Grenoble
    2018
    Licence Professionnelle SIGD : Parcours Big Data

Skill set

Categories