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Alexandre OllietAO

Alexandre Olliet

Expert Data and AI

€600/day
1 project
Rennes, FR
15+ years
Talend
Python
Informatica PowerCenter
Artificial Intelligence
Oracle

Average response time: 1 hour

Freelancer profile translated to English.
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About Alexandre

I support companies in the design and deployment of robust Decision Support Information Systems (DSIS), from requirements gathering to production.

Currently Tech Lead Data & AI Dev, I leverage my dual background in "Traditional Data Engineering" and "Modern Data Science" for your high-value projects.

My areas of intervention:
Architecture & Flows (ETL/ELT): Senior expertise in Talend and Informatica. Automation of complex flows and data reliability.

Data Foundations (DBMS): Optimization and expert modeling (SQL Server, Oracle, PostgreSQL, MySQL).

AI Innovation: Development of Artificial Intelligence solutions in Python to transform your data into performance drivers.

Support & Training: Audit of existing systems, tool selection (Open Source vs. Proprietary), and upskilling your teams.

Why collaborate?
- Seniority: 20 years of multi-sector experience for pragmatic and profitable solutions.
- Flexibility & Commitment: I work remotely on flexible schedules (evenings and weekends), ideal for technical expertise, debugging, architecture, or training without impacting your daytime resources.
- Efficiency: My experience allows me to get straight to the point, ensuring an excellent quality/time ratio.
Insurance
Banking and Financial Services
Software Publishing
Digital Business Models
Digital and IT Services

  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Groupama Loire Bretagne
    Tech Lead Data & AI Dev
    BANKING AND INSURANCE
    September 2020 - Today (5 years and 11 months)
    Rennes, France
    Data expert serving mutual insurance, I lead the design and optimization of highly available decision support architectures. My role combines mastery of complex flow integration (Talend, Informatica) and the performance of data foundations (SQL Server, Oracle).

    As an innovation driver, I design and deploy Artificial Intelligence solutions in Python to transform raw data into performance levers for all business units.
    Talend Oracle Informatica SQL Server Python
  • Data Decision
    Decision Support and Data Expert
    DIGITAL AND IT
    November 2018 - September 2020 (1 year and 10 months)
    Rennes, France
    1. Consulting and Support
    From implementation to redesign or audit of your Decision Support Information System (DSIS), I will guide you throughout the construction or transformation of this system.

    Based on your needs, context, and resources, I will guide you to the most suitable solution for your company. I will work closely with you throughout the project (agile or V-cycle methodology) to ensure the best chance of success.

    2. Design and Development
    Over these years and experiences, I have developed expertise in:

    - Designing and managing decision support (and operational) data models. I have perfect mastery of market-leading tools like PowerDesigner and can work on Oracle, MySQL, PostgreSQL, SQL Server, SybaseIQ, MariaDB databases.

    - Decision support tools (especially Open Source, but also proprietary):
    • Solutions/Platforms: Knowage (formerly SpagoBI), Pentaho, JasperSoft, Jedox
    • Data Ingestion and Preparation: Talend Data Integration, Talend Data Preparation, Pentaho Data Integration, SQL Server Integration Services, Trifacta
    • Reporting (Classic, Ad Hoc, DataViz, OLAP): BIRT, Pentaho Report Designer, iReport, MyReport, Power BI, Qlik View, Mondrian

    3. Tool Training
    I conduct training sessions for user groups of all levels on several decision support tools:
    - Talend
    - SpagoBI
    - BIRT
    - Mondrian
    - MyReport
    - ...
    SQL Server Consulting Talend Training
  • Daunat
    Decision Support Project Manager / Trainer
    AGRICULTURE
    September 2017 - November 2018 (1 year and 1 month)
    Rennes, France
    Sep. 2017 - Present
    Daunat, Agribusiness, Rennes (35)

    Decision Support Project Manager

    Implementation/Evolution of the decision support solution:
    - Needs analysis, Drafting functional and technical specifications
    - Data warehouse modeling
    - ETL, Reporting
    - User documentation

    Tool Training
    SSIS SQL Server MyReport Microsoft Power BI Oracle
Check out Alexandre's experience

Reviews

3.0

Out of 1 rating

M

Matthieu

HYDRODIS

Reviewed on 2/11/2019

Recommendations

Olivier CousinOC
BD
FU
+2
Olivier Cousin and 4 other people have recommended Alexandre

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Education

  • DESS Computer Engineering and Statistics
    Université de Provence - Aix-Marseille 1
    2004
    Informatique, Statistiques, Bases de données, Analyse des données, Finance, Datamining

Certifications

Skill set

Project Management
Pentaho
SpagoBI
Consulting
Training
Jedox
JasperSoft
Qlik
MyReport
Birt
Mondrian
SQL Server
MySQL
PostgreSQL
Sybase IQ
SQL
MDX
Open Source
Design
DSIS
Development
OLAP
Data Warehouse
Modeling
Big Data
Data Science
Data
R
Pentaho Data Integration
Cognos
PowerAMC
SSIS
MariaDB
Technical Specifications
Technical Acceptance
Linux
JPivot/Mondrian
Database Administration
Palo
Team Management
JPivot /Mondrian
Knowage
Microsoft Power BI
Decision Support

Categories