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Sofiane B.SB

Sofiane B.

Data analyst

€578/day
Lille, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sofiane

My philosophy:A dashboard is only valuable if it is understood and used.

With over 6 years of experience in large retail (Leroy Merlin, Auchan), I combine solid technical expertise (SQL, BigQuery) with a unique sensitivity for Data Storytelling and UX Design.

My goal? To transform your complex data into clean, intuitive, and visually impactful interfaces. My greatest achievement? The deployment of a highly visual dashboard consulted over 25,000 times at Leroy Merlin.

My Major Strengths
  • Design & Data UX: Design of Power BI reports conceived for the end-user. No more cumbersome systems, only clarity and interactivity.

  • Robust Modeling: Efficient SQL querying, cleaning, and cross-referencing of complex multi-source data flows (BigQuery, PostgreSQL).
  • Business Scoping: Support for business units (Finance, Product, Marketing) in translating their needs into strategic indicators (KPIs).

Technical Stack
  • Reporting (BI): Microsoft Power BI (DAX), Looker Studio.

  • Data & Cloud: SQL (PostgreSQL), Google Cloud Platform (BigQuery).

Need modern dashboards that your teams will enjoy using?

Contact me to give your data another dimension!
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Leroy Merlin
    Data Analyst
    RETAIL (LARGE RETAILERS)
    January 2024 - Today (2 years and 7 months)
    Villeneuve-d'Ascq, France
    Within the Data Performance department at Leroy Merlin, I work on cross-functional projects with high added value to drive company performance through complex data modeling and Data Storytelling.

    🚀 Major Achievements:

    Leader Performance Dashboard: Design and deployment of the company's most consulted dashboard (+25,000 views), centralizing over 150 strategic KPIs to facilitate decision-making for business units.

    Cross-functional & Mobile Projects: Analysis, structuring, and provision of data for monitoring the performance of the brand's mobile applications.

    Architecture & Modeling: Cross-referencing complex multi-source data sources (SQL) to create robust, optimized, and scalable data models.

    🎯 Key Missions & Activities:

    Requirements Gathering & Scoping: Supporting business teams (Finance, Performance, Product) in defining their key indicators (360° KPIs).

    Data Storytelling & Data UX: Presenting data in the form of highly visual, interactive, and user-experience-oriented Power BI dashboards to maximize adoption.

    Industrialization & Quality: Writing functional and technical documentation, automating data flows, and administering data sources.

    Change Management: Supporting and training end-users in adopting decision-support tools.
    Big Query Microsoft Power BI SQL DAX Atlassian JIRA
  • Auchan
    Application Manager
    RETAIL (LARGE RETAILERS)
    January 2023 - December 2023 (11 months)
    Villeneuve-d'Ascq, France
    Project: As part of the release of an application under Appsheet (Magasin Platform), I am involved in incident management (RUN) as well as the maintenance and development of the application through SQL queries.

    Context: As part of optimizing the management of Auchan's store network, an application was developed to help them better manage orders and deliveries between hypermarkets and supermarkets. It is in this context that I joined this mission to oversee and contribute to the application's development.

    Run:
    ● Receiving various needs (EasyVista)
    ● Estimating deliverables
    ● Collecting necessary information for execution
    ● Problem resolution

    Development:
    ● Collecting business requests via Jira
    ● Planning deliverables
    ● Developing various application evolutions in SQL
    ● Testing phase
    ● Deployment

    Application Analysis:
    ● Receiving data via Postgresql
    ● Creating reports in Looker
    ● Activity rate of stores using the application across the entire Auchan network, active/inactive stores, etc.

    Flow Analysis:
    ● Receiving appsheet flows in various buckets on Google Cloud Platform (Prod and staging)
    ● Analyzing successful routing to the data repository via Cortex
    ● Querying the data repository with BigQuery to verify data consistency between the repository and appsheet
    ● Resolving flow-related issues
    Looker Studio Easyvista Jira SQL Big Query
  • Howdens Cuisines
    Data Analyst
    RETAIL (LARGE RETAILERS)
    November 2020 - January 2023 (2 years and 2 months)
    62880 Vendin-le-Vieil, France
    Project: In direct contact with the teams in England, I was responsible for creating visual and relevant dashboards regarding the company's activity. Howdens Cuisine had recently established itself in France, and the challenge was to provide precise reports to assist the company in strategic and marketing decision-making.

    Context: Due to strong business growth. The analysis of different kitchen ranges, new products, and various categories was an essential factor in making decisions about their marketing strategy.

    ● Receiving various needs
    ● Estimating deliverables
    ● Collecting necessary information (BO Universe)
    ● SQL querying for indicator design
    ● Creating various dashboards
    ● Automating these dashboards
    ● Analyzing results (inconsistencies) and providing solutions

    SEO Traffic Analysis
    Context: Following their strong growth, Howdens Cuisine launched a new website for artisans (professional site) in addition to their consumer site (private individual site). I therefore worked on analyzing the SEO traffic of these 2 sites as well as their performance:

    ● Receiving data via Google Analytics
    ● Creating reports in Data Studio
    ● Bounce rate, number of sessions, catalog requests, number of users, etc...
    ● Referrals (organic, referral, direct, Social Media)
    ● Number of conversions (Objective achievement)
    ● Site performance (404 errors, most clicked pages, most searched terms, page loading)
    Google Data Studio Google Analytics Microsoft Power BI SAP Business Objects Talend

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Education

  • Master's degree Big Data & Business Intelligence
    Enigma School
    2022
    Master's degree Big Data & Business Intelligence
  • Bachelor's degree in Statistics, Computer Science, and Business Intelligence
    IUT de Roubaix
    2020
    licence statistique informatique décisionnel

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