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Koitrin K.KK

Koitrin K.

Data Engineer | Azure | Databricks

€400/day
Rennes, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Koitrin

Are your pipelines lacking efficiency? Is your data quality hindering your analyses? Are you struggling to align your data architecture with your business needs?

I help companies structure, automate, and improve the reliability of their data platforms.

How I can help you:

⚙️ Optimize and make your pipelines reliable – Automation and orchestration of ETL/ELT data flows with Azure Data Factory, Spark, Kafka, Databricks.

📊 Improve data quality – Definition of the data lifecycle, integration of quality criteria with Python, DBT, and SLA monitoring to ensure reliable and usable data.

🔒 Implement data security – Implementation of appropriate roles and permissions on Azure, Databricks for strict control of access to your platform.

🧩 Design high-performance data models – Definition and implementation of relational and analytical models adapted to business needs, optimized for efficient SQL exploitation.

🤝 Align technology with your business needs – Close collaboration with your teams to ensure optimal data-business alignment.

🏢 They trusted me:

📌 Stellantis – Optimization and automation of data pipelines.
📌 Renault – Migration of a critical NoSQL platform to SQL in Azure for driver-assistance systems.
📌 Crédit Mutuel Arkéa – Structuring and modeling data for better exploitation of business indicators.

Contact me, I'll respond within the hour!
  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • Engie
    Data Engineer
    ENERGY AND UTILITIES
    June 2025 - Today (1 year)
    Paris, France
    Context: Data platform for monitoring sales campaigns

    Tasks:
    - Implementation of a medallion architecture on Databricks
    - Implementation of a generic ingestion module on Databricks
    - Automation of documentation for 42 tables
    - Data quality detection with quarantine.
    Databricks Python PySpark Collibra Airflow
  • KEOLIS
    Data Engineer
    TRANSPORTATION
    March 2025 - May 2025 (2 months)
    Rennes, France
    Context: Monitoring the punctuality of STAR network buses (short mission)

    Tasks:
    - Orchestration of ETL processes via Azure Data Factory
    - Automation of CI/CD deployment via Azure DevOps
    - Creation of Power BI reports
    Microsoft Azure Azure Data Factory Databricks SQL Microsoft Power BI
  • Stellantis
    Lead Data Engineer
    AUTOMOBILE
    November 2022 - February 2025 (2 years and 3 months)
    Rennes, France
    Context: Cloud migration of a testing platform for autonomous vehicle functions (Renault-Stellantis partnership)

    Tasks:
    - Implementation of a medallion architecture on Databricks
    - Sharing Databricks best practices (Unity Catalog, DLT)
    - Automation of CI/CD deployment via Azure DevOps
    - Terraform developments for provisioning on Azure
    Python Databricks Microsoft Azure SQL CI/CD

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Education

  • Master MIAGE, Computer Science
    University of Rennes 1
    2021
    Master MIAGE, Informatique
  • Professional Bachelor's Degree, MIAGE (Information Technology Methods Applied to Business Management)
    Félix Houphouët-Boigny University
    2018
    Licence Professionnelle, MIAGE (Méthodes Informatiques Appliquées à la Gestion d'Entreprises)

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