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Sammy El TakritiSE

Sammy El Takriti

Data Engineer & Data Analyst

€640/day
2 projects
Berlin, DE
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sammy

  • Data Engineer and Data Analyst with over 10 years of experience in quantitative analysis and modeling in the fields of energy, emissions, and sustainability.
  • Experienced in building and analyzing structured datasets and developing analytical models for public and private organizations.
  • Currently focusing on applied data science, machine learning, and data engineering, with experience in building end-to-end Python pipelines and mentoring over 400 students in analytics and ML programs.
  • German

    Native or bilingual

  • English

    Native or bilingual

  • French

    Native or bilingual

  • Spanish

    Fluent

  • Italian

    Fluent

  • Portuguese

    Conversational

  • Arabic

    Basic

Can work on-site
Berlin (up to 40km)

Experience

  • Finviz
    Malt logoOn Malt
    Data Engineering Pipeline for Product Analytics
    DIGITAL AND IT
    January 2026 - May 2026 (4 months)
    Berlin, Germany
    I designed and implemented a cloud-native analytics pipeline to centralize product and revenue data in Google Cloud, establishing a reliable data foundation for reporting and analytics.

    My main contribution was consolidating fragmented data sources into a consistent, scalable end-to-end data architecture with clearly defined data tiers (Bronze and Gold layers) and ensuring a robust single source of truth for product usage and revenue metrics.

    My responsibilities included building an ingestion pipeline (Google Tag Manager → Google Analytics → BigQuery) with a consistent event schema, developing a Python-based Cloud Function (Pandas) for daily extraction and transformation of customer data, and implementing SQL-based validation and quality checks in BigQuery.
    Python SQL Google Tag Manager Google Cloud Platform (GCP) Google Analytics
  • Prowo GmbH
    Data Analyst | Data Engineer
    PUBLIC SECTOR
    May 2025 - Today (1 year and 3 months)
    Berlin, Germany
    • Developed Python-based ETL pipelines to extract, transform, and load data from the Daarwin social welfare administration platform's reporting API, enabling large-scale data collection and structured exports for downstream analysis.
    • Coordinated and scheduled ETL workflows using Apache Airflow by implementing automated DAGs with configurable schedules, retry mechanisms, and callback notifications for reliable and maintainable data pipelines.
    • Designed and deployed a containerized analytics stack using Docker Compose, integrating PostgreSQL for data storage and Apache Superset for visualization and dashboard creation.
    • Implemented a robust API client with authentication, retry logic, timeout handling, and structured error logging, exporting processed data in JSON, CSV, and schema formats.
    Python Docker SQL Apache Superset Airflow
  • Le Wagon
    Teacher in Data Science, Data Analytics and Data Engineering
    EDUCATION AND E-LEARNING
    January 2023 - Today (3 years and 7 months)
    Berlin, Germany
    • Taught subjects in **Data Science**, **Data Analytics**, and **Data Engineering**.
    • Instructed over 400 students across more than 30 technical topics, including **data preprocessing**, **feature engineering**, **supervised learning**, and **model evaluation**.
    • Mentored students on end-to-end analytics and **machine learning projects**, ensuring the correct use of modeling pipelines and best practices.
    Python Scikit-learn Machine learning Docker SQL

Reviews

4.5

Out of 2 ratings

C

Christina

Catalyst Institute for Creative Arts and Technology GmbH

Reviewed on 10/7/2025

Working with Sammy was an outstanding experience. We faced a frustrating challenge: every week, we had to manually go through all ActiveCampaign pipelines, transfer recruitment numbers into a spreadsheet, and try to track progress. It was repetitive, time-consuming, and prone to errors. Sammy, an absolute expert in his field, developed a fully automated pipeline visualization system for us. Today, we have dashboards with week-over-week comparisons and annual overviews that we can easily adapt for future recruitment cycles. What was once almost impossible has now become simple, fast, and reliable. This was not an easy task – integrating ActiveCampaign data into Looker Studio via third parties was very complicated. Sammy went far beyond the agreed scope, developing his own scripts to retrieve data directly from the ActiveCampaign API. Thanks to his persistence and creativity, we can now run the script ourselves every week, retrieve data in seconds, and compare it easily across weeks and years. What particularly sets Sammy apart is not just his technical skill, but also his ability to teach. Throughout the entire process, he explained every step and shared his knowledge, allowing me to learn an incredible amount myself. You immediately notice that he is not only a brilliant data scientist but also a great teacher (no wonder, as he also teaches at Le Wagon). Sammy was resourceful, detail-oriented, and communicated clearly and transparently at all times. He far exceeded our expectations, making a complex CRM system understandable and usable for our team. We are thrilled with the result and look forward to working with him again on future data visualizations. Anyone looking for an expert who combines deep technical knowledge with patience, creativity, and the heart of a teacher will find Sammy to be the right choice!
S

Shawn

Lead Product Manager - Finviz

Reviewed on 6/28/2026

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Education

  • Bootcamp in Data Science
    Le Wagon
    2022
    Teilnahme an einem 9-wöchigen Vollzeit-Intensiv-Coding-Bootcamp zum Erlernen von Data Science mit Python: - Maschinelles Lernen und Deep Learning mit scikit-learn, TensorFlow, pandas, NumPy, Matplotlib - Datenprodukte mit Google Cloud Platform, MLflow, FastAPI, Streamlit, SQL, BigQuery - Statistik mit SciPy, seaborn und statsmodels
  • MA and BA in Bioengineering, Environmental Sciences and Technologies
    Université Libre de Bruxelles
    2009
    Masterarbeit in analytischer Chemie: Untersuchung der oxidativen Eigenschaften eines atmosphärischen Plasmas

Skill set

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