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Denis JaffréDJ

Denis Jaffré

Data Engineer | From Business Need to Production Deployment

€600/day
Versailles, FR
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Denis

Need to structure your data or integrate AI into your processes?

Data engineer with a business background (11 years in banking/telecoms business analysis, 9 years in retail).

I work from business need analysis to cloud deployment (AWS, GCP), including data architecture and pipeline orchestration.

🤖 I use AI daily (Claude Code): I handle requirements, architecture, and business rules; the code agent and I review together.
🎓 Certified AWS Solutions Architect - Associate + AWS AI Practitioner.
📋 Certified Data Engineer (RNCP 38919) from Liora (2025).
🇬🇧 Intermediate English (TOEIC 820).
  • French

    Native or bilingual

  • English

    Conversational

Can work on-site
Versailles (up to 20km)

Experience

  • Vapostore
    Store Manager (Franchise)
    RETAIL (SMALL BUSINESS)
    July 2014 - May 2023 (8 years and 10 months)
    Levallois-Perret, France
    - Full management of a point of sale (stock, replenishment, merchandising, staff, accounting, etc.)
    - Customer reception, sales consulting, and customer loyalty
    - Sales analysis and implementation of optimization strategies (KPIs)
    - Monitoring brand image compliance and related guidelines
    - Recruitment and management of 5 employees
    Retail Business Manager Customer Loyalty KPI Monitoring Team Management
  • ADN'co
    Payment Systems Business Analyst Consultant
    CONSULTING AND AUDITS
    July 2011 - January 2013 (1 year and 6 months)
    Paris, France
    • July 2011 to March 2012

    FINANCIAL INSTITUTION (OVERSEAS TERRITORIES) - Payment Systems Business Analyst Consultant

    - Assisted the Director of Financial Services in launching a Visa card and deploying 3D Secure for all of the client's bank cards
    - Drafted payment card business requirements for technical teams
    - Drafted business requirements for the personalization bureau
    - Project coordination with the card personalization bureau
    - Coordinated and followed up weekly on projects between the client's business teams, Business Analysts and Developers, and the Lead Bank (card issuer partner)
    - Drafted 3D SECURE business requirements for technical teams

    • March 2012 to January 2013

    FOR VARIOUS PROSPECTS

    - As part of a project team, participated in various market and opportunity studies related to new payment methods
    - For an urban community, created a descriptive document for a catalog of local citizen services (e.g., transport, university, personal services, etc.)
    - Researched information on NFC-associated services (e.g., KESAKA, etc.)
    - Monitored new players in e-payment and m-payment
    Project Coordination Specifications Technology Watch Banking Payment Methods
  • Intervenance
    Business Analyst Consultant
    CONSULTING AND AUDITS
    October 2009 - February 2011 (1 year and 4 months)
    Paris, France
    • August 2010 to February 2011

    - Short-term assignments under payroll leasing.
    - TOEIC Listening & Reading taken on 12/15/2010 - 820 points - Advanced CEFR level
    - Self-study in languages with the goal of working on international projects:
    ◦ English: Intermediate, aiming to pass the TOEIC.
    - Internet monitoring for business information on revolving credit.

    • October 2009 to June 2010

    BNP PERSONAL FINANCE - Business Analyst Consultant

    - Project management tasks carried out for the evolution of the SICLID application specifically for the S2P / Carrefour partner:
    - Managed the production monitoring of the PASS Mastercard launched in February 2009.
    - Supported change management for S2P regarding new BNP Personal Finance processes and the internal takeover of the Business Analysis activity.
    - Monitored cross-functional projects between S2P and BNP Personal Finance.
    Project Management Banking Payment Methods Change Management

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Education

  • DATA ENGINEER
    Liora (ex DataScientest), Mines Paris - PSL
    2025
    DATA ENGINEER
  • COMPUTER BUSINESS ENGINEERING DEGREE
    ESIC-ESSICA
    1998
    DIPLÔME D'INGÉNIEUR COMMERCIAL INFORMATIQUE

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