Freelancer profile translated to English.

Description

Data Engineer expert with 13 years of experience on critical projects (Banking, Insurance, Energy, Telecoms), I work from ingestion to delivery: Lakehouse architecture, complex ETL/ELT pipelines, governance and MDM.

Available immediately — Hybrid (Île-de-France + remote) — Daily rate: €600-700

Architecture & Modern Data Stack

Design of Medallion (Bronze/Silver/Gold), Data Vault, and Star Schema architectures on Microsoft Fabric (OneLake, Lakehouse), Snowflake, and Databricks.

Data Engineering & Pipelines

Development of complex ETL/ELT pipelines with Semarchy xDI, ODI 12c, Azure Data Factory, SSIS. Processing of critical streams in Python/PySpark and advanced SQL.

MultiCloud Cloud

Microsoft Azure (Fabric, Synapse, ADF, ADLS Gen2) · Snowflake · Databricks · GCP (BigQuery) · AWS (S3, Glue, Redshift).

DataViz & Reporting

Power BI (advanced DAX, Semantic Models), SSRS — strategic and operational dashboards.

Governance, MDM & Quality

Semarchy xDM, Microsoft MDS, GDPR, Data Quality, CI/CD (Git, CloudBees).

**Key Clients**: RTE · SFR · MGEN · ENEDIS · TOTAL · Air Liquide · BNP Paribas

Languages

French
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 50km)

PROJET PROFESSIONEL
End-to-End Data Architect | Microsoft Fabric
February 2026 - March 2026 (1 month)
Context
Implementation of an automated monitoring solution for a fleet of 3
wind turbines (IoT data every 10 min).
Actions
Processing
Development of Python Notebooks (PySpark) for data
cleaning and enrichment
Visualization
Creation of a unified semantic model and Power BI reports
for production monitoring (kWh)
Ingestion & Storage
Configuration of a Lakehouse on OneLake and orchestration via
Data Pipelines
Monitoring: Implementation of an alerting system via Data Pipelines
to detect ingestion failures (10-min freshness SLA).
Documentation: Writing a corrective maintenance guide for
restarting data flows
Technical Environment
Microsoft Fabric, OneLake, Lakehouse, Python, PySpark, Power BI
Data Pipelines, Notebooks
Microsoft Fabric
MGEN
Freelance Senior Data BI Consultant / Semarchy xDI(Stambia) ETL-Dataviz(Power BI-Report Builder)
ENERGY AND UTILITIES
March 2024 - Today (2 years and 3 months)
Paris, France
•Management of the extraction and industrialization of critical indicators for feeding a business application and a "Risk" decision-making datamart.
•Achievements:
•Autonomous end-to-end management of Data projects
•Translation of business needs into technical solutions (SFD, business rules)
•Design and development of complex ETL flows using Semarchy xDI
•Populating and maintaining a decision-making datamart
•Implementation of automatic data quality and validation controls
•Reverse engineering of existing flows to ensure service continuity
•Design and update of decision-making reporting
•Industrialization and deployment (Git / CI-CD)
•Technical Environment:
•Semarchy xDI (Stambia), SQL, Datamart, Data Quality, Git, CI/CD, Report Builder, Insurance / Risk
Gitlab CI/CD ODI SQL Semarchy xDI Semarchy xDM
RTE
Data Migration Support
ENERGY AND UTILITIES
January 2021 - Today (5 years and 5 months)
Puteaux, France
Organization, preparation, and facilitation of workshops
Participate in the creation of mockups
Writing detailed technical and functional specifications
Writing functional tests and test strategy
Impact analysis related to data protection
Design data synchronization mechanisms
Star data modeling with Data Modeler
Needs Analysis: In collaboration with business teams to understand specific requirements related to data integration, Audit of source data
Technical Design: Development of data models and detailed technical specifications to ensure robust and scalable design of integration solutions.
ODI Development: Creation of interfaces, packages, and data integration procedures. Management of ODI agent scheduling and execution planning,
Using native ODI IKM, LKM, and CKM
Development of ODI SQL, PL/SQL procedures
SCD data historization mechanism
Data synchronization mechanisms (FULL, DELTA, and CDC)
Performance Optimization: Optimization of SQL queries and improvement of ETL process execution times
Data Quality: Implementation of data quality controls to ensure data integrity and consistency throughout the process
Evolutionary Maintenance: Managed changes to existing integration systems based on business changes and new requirements.
Training and Support: Provide training to end-users and ensure continuous technical support to guarantee the proper functioning of implemented solutions
Power BI technical support
Using Power Query to extract and transform data from various sources
Creation of interactive and dynamic dashboards
Execution of DAX queries and functions
Create, test, and deploy Power BI scripts
Medallion Architecture

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Master 2 in Decision Informatics
University of Reims
2011
Master 2 Informatique Décisionnel
Master 2 in Medical Imaging
University of Tours
2010
Master 2 Imagerie Médicale

Check out Dieynaba's education

SCRUM MASTER Certification
ORSYS
2022
Power BI PL-300
orsys
2022

Dieynaba's certifications are only visible to Malt Community members

Dieynaba Diao

Senior Data Engineer & Architect Consultant

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