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Célestine TsondoCT

Célestine Tsondo

Data Analyst | Business Intelligence | Ex-Bank

€320/day
Paris, FR
8-15 years
Microsoft Power BI
SQL
Microsoft Excel
Business intelligence
Data Analysis

Average response time: 1 hour

Freelancer profile translated to English.
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About Célestine

Data Analyst specialized in Business Intelligence and digital transformation

After 11 years in retail banking (BNP Paribas, LCL, Société Générale),
I am putting my business expertise at the service of your data projects to transform
your data into actionable strategic decisions.

✨ MY ADDED VALUE

My dual business-tech expertise allows me to:
- Quickly understand your business challenges (finance, e-commerce, SaaS)
- Structure reliable and sustainable data repositories
- Create impactful decision-making dashboards with data storytelling
- Model complex indicators (advanced DAX, business KPIs)
- Manage data projects in a Business Owner (MOA) capacity (complete functional specifications)

📊 TECHNICAL EXPERTISE

Business Intelligence: Power BI (advanced DAX), Tableau, Looker Studio
Data Analysis: Python (Pandas, NumPy, Matplotlib), SQL, advanced Excel
Data Visualization: Interactive Dashboards, Data Storytelling
Project Management: Data MOA, business needs gathering, functional specifications

🎯 AREAS OF EXPERTISE

Finance & Banking | E-commerce | SaaS | Retail

💼 RECENT PROJECTS

- Predictive analysis of banking churn (10K clients, identification of 409
high-risk clients representing €49M in assets)
- E-commerce profitability dashboard (15+ custom DAX measures,
360° Product/Marketing/Profitability management)
- Finance data repository structuring (DSI, complete traceability
of client processes)

🚀 AVAILABILITY

Available for short or long-term freelance missions, on-site
(Île-de-France) or remote.

Response within 24 hours.

  • English

    Native or bilingual

  • French

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • PREPAR-VIE
    Business Owner Project Manager
    BANKING AND INSURANCE
    April 2025 - Today (1 year and 2 months)
    Puteaux, France
    Management of data and digital transformation projects within the Finance IT department.

    Key achievements:
    - Structuring the Finance data repository : definition of business rules, complete documentation, data quality assurance
    - Active participation in the SAGE migration (electronic invoicing 2026-2027) : writing functional specifications covering 100% of client processes
    - Collaboration with Data Engineers to ensure data consistency and quality
    - Management of functional testing and acceptance testing on several Finance/Accounting modules

    Skills used: Data project management, writing functional specifications, technical collaboration, data quality

    Environment: Finance, SAGE, Datamart, IT Workflows
    Project Management Needs Gathering Project Management Functional Specifications Functional Specifications Document
  • Société Générale
    Assistant Branch Manager | Digital Adoption Manager
    BANKING AND INSURANCE
    July 2022 - December 2022 (5 months)
    Paris, France
    Team management and performance management through data.

    Results achieved:
    - Management of a team of 7 advisors with daily KPI monitoring (sales performance, customer satisfaction NPS)
    - Support fordigital transformation: 95% of clients onboarded
    to digital tools
    - Creation of decision-making dashboards to optimize sales processes and identify growth drivers
    - Analysis of performance data to adjust sales strategy in real-time

    Skills used: KPI management, dashboard creation, performance analysis, digital change management

    Impact: Significant improvement in sales results and customer satisfaction through a data-driven approach
  • Lcl
    Account Manager | Digitalization Ambassador for Small Businesses
    BANKING AND INSURANCE
    June 2018 - June 2022 (4 years)
    Paris, France
    Management of SME portfolios and deployment of digital tools at the regional level.

    Key achievements:
    - Management of a portfolio of 250 SME clients with credit outstanding > €50M
    - AppointedRegional Digital Ambassador: deployment of digital tools to clients and employees, adoption rate of 85%
    - In-depth analysis of SME financial and operational data for strategic recommendations
    - Training and support for clients in using financial management tools

    Skills used: Financial analysis, change management, user training, digital project management

    Impact: High adoption of digital tools and improved financial management for SME clients
Check out Célestine's experience

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Education

  • Google Analytics
    Google ADS
    Google Analytics
  • Introduction to code (HTML, CSS, Javascript) Deploy a Digital Transformation Python project for data analysis
    Introduction au code (HTML, CSS,Javascript) Déployez un projet de Transformation Digitale Python pour l'analyse de données
Check out Célestine's education

Skill set

Data Visualization
Exploratory Data Analysis
Business Intelligence (BI) Strategy
User Segmentation
KPIs and Metric Definition and Monitoring

Categories