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Hassen ChaariHC

Hassen Chaari

Lead Machine Learning Engineer

€800/day
Paris, FR
3-7 years

Average response time: 1 hour

About Hassen

Machine Learning Engineer with Data Science and Data Engineering experience in buiding anomaly detection and fraud prevention systems, overcoming complex architectural and scalability issues in Banking industry. I have practiced Machine Learning and statistical techniques at high scale using tools like Spark, Hadoop and Python, Mlflow and Airflow. I have designed production data pipelines to prepapre, train and deploy Machine Learning models. I am comfortable with production grade code in either Python and Java.
  • Arabic

    Native or bilingual

  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • Swiss Life France
    Lead Machine Learning Engineer
    February 2022 - Today (4 years and 4 months)
    Building AI systems (Frauds, antichurn, NLP...) in the transversal Data Science & AI team in collaboration with SwissLife entities & strategic partners, and implementing MLOps best practices tools, and Machine Learning & Deep Learning models.
  • BNP PARIBAS
    Lead Machine Learning Engineer
    September 2020 - October 2022 (2 years and 1 month)

    - Lead the maintenance, development, optimization and research of new Machine Learning models for fraud detection at scale (datasets up to billions of rows).
    - Responsible of the Data Lab Flux platform: maintenance, implementation of new technologies and actively contribute to the evolution of the platform.
    - Ensure the quality of the code, factorization and documentation. Optimize and enhance computational efficiency of algorithms and software design.
    - Guide non-technical team in understanding analytics at scale, infrastructure as code and best practices for robust software development.
    - Implementation and continuous improvement of several production pipelines: Data extraction, Train, experiments, industrialization and monitoring.
    - Partner with business stakeholders, engineering team and Data Scientists in order to add/implement new features for fraud detection models.
    - Lead the Warmup process(using historical data, the Warmup is used to initialize the features used in fraud detection): implementation and industrialization. Technologies: Java, Python3, Spark, Flink, Apache Kafka, Hadoop, Airflow, MlFlow, JupyterHub, Machine Learning Libraries (pandas, sklearn, Tensorflow, shap…), GitLab, Jenkins, Ansible, Splunk.
  • BNP PARIBAS
    Data Engineer/Scientist
    October 2018 - September 2020 (1 year and 11 months)
    Île-de-France, France
    At OLAF (Outil Lutte Anti Fraudes) project, our mission is to build a real time platform to detect and prevent fraud with Machine Learning, directly in the payment systems before any money went out:
    - Work closely with the risk team and Data Architects in order to construct the first Data Lab Flux.
    - Develop a software layer in Python (based on MlFlow & Airflow) for the the non-technical Data Science Team to bring automation to the model design and experimentation processes.
    - Partner with the business team, data engineers and data scientists in order to design the first machine learning models for fraud detection.
    - Ensure the optimization and the continuous improvement of Machine Learning models for fraud detection: Contribute with the business team to identify new features, Sampling techniques, Split strategy (Time series), Bayesian optimization of scenarios (business rules and ML). Technologies: Java, Python3, Spark, Flink, Apache Kafka, Hadoop, Airflow, MlFlow, Jupyter, Machine Learning Libraries (pandas, sklearn, Tensorflow, shap ...)

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Education

  • Master M2 Informatique décisionnelle
    Université Paris Dauphine
    2017
    Master M2 Informatique décisionnelle
  • Diplôme national en ingénieurie informatique
    École nationale des sciences de l'informatique
    2015
    Diplôme national en ingénieurie informatique

Skill set (40)

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